diff --git a/Elwig/Windows/AdministrationWindow.cs b/Elwig/Windows/AdministrationWindow.cs
index 379a7f1..e79789d 100644
--- a/Elwig/Windows/AdministrationWindow.cs
+++ b/Elwig/Windows/AdministrationWindow.cs
@@ -104,6 +104,7 @@ namespace Elwig.Windows {
                 cb.SelectionChanged += ComboBox_SelectionChanged;
             foreach (var lb in ListBoxInputs)
                 lb.SelectionChanged += ComboBox_SelectionChanged;
+            LockInputs();
         }
 
         private void OnClosing(object? sender, CancelEventArgs evt) {
diff --git a/Elwig/Windows/AreaComAdminWindow.xaml.cs b/Elwig/Windows/AreaComAdminWindow.xaml.cs
index a2b3f12..8f4dd2c 100644
--- a/Elwig/Windows/AreaComAdminWindow.xaml.cs
+++ b/Elwig/Windows/AreaComAdminWindow.xaml.cs
@@ -39,10 +39,6 @@ namespace Elwig.Windows {
             ViewModel.FilterSeason = Utils.CurrentYear;
         }
 
-        protected override async Task OnInit(AppDbContext ctx) {
-            LockInputs();
-        }
-
         private void FocusSearchInput(object sender, RoutedEventArgs evt) {
             if (!IsEditing && !IsCreating) {
                 SearchInput.Focus();
@@ -451,17 +447,19 @@ namespace Elwig.Windows {
         }
 
         private async void ActiveAreaCommitmentInput_Changed(object sender, RoutedEventArgs evt) {
+            if (!HasContextLoaded) return;
             await RefreshList();
         }
 
         private async void SearchInput_TextChanged(object sender, RoutedEventArgs evt) {
+            if (!HasContextLoaded) return;
             var binding = ((TextBox)sender).GetBindingExpression(TextBox.TextProperty);
             binding?.UpdateSource();
             await RefreshList(true);
         }
 
         private async void SeasonInput_TextChanged(object sender, TextChangedEventArgs evt) {
-            if (ViewModel.FilterSeason == null) return;
+            if (!HasContextLoaded || ViewModel.FilterSeason == null) return;
             await RefreshList();
         }
 
diff --git a/Elwig/Windows/BaseDataWindow.xaml.cs b/Elwig/Windows/BaseDataWindow.xaml.cs
index 390be7d..a28d5f5 100644
--- a/Elwig/Windows/BaseDataWindow.xaml.cs
+++ b/Elwig/Windows/BaseDataWindow.xaml.cs
@@ -153,10 +153,6 @@ namespace Elwig.Windows {
             ParameterExportEbicsAddress.IsEnabled = true;
         }
 
-        protected override async Task OnInit(AppDbContext ctx) {
-            LockInputs();
-        }
-
         protected override async Task OnRenewContext(AppDbContext ctx) {
             await base.OnRenewContext(ctx);
             FillInputs(App.Client, await ctx.FetchSeasons(Utils.CurrentLastSeason).SingleOrDefaultAsync());
diff --git a/Elwig/Windows/ContextWindow.cs b/Elwig/Windows/ContextWindow.cs
index ea58985..c179432 100644
--- a/Elwig/Windows/ContextWindow.cs
+++ b/Elwig/Windows/ContextWindow.cs
@@ -18,6 +18,8 @@ namespace Elwig.Windows {
             }
         }
 
+        protected bool HasContextLoaded { get; private set; }
+
         private bool _renewPending = false;
 
         private readonly RoutedCommand CtrlR = new("CtrlR", typeof(ContextWindow), [new KeyGesture(Key.R, ModifierKeys.Control)]);
@@ -51,6 +53,7 @@ namespace Elwig.Windows {
             Mouse.OverrideCursor = Cursors.AppStarting;
             using var ctx = new AppDbContext();
             await OnRenewContext(ctx);
+            HasContextLoaded = true;
             await OnInit(ctx);
             Mouse.OverrideCursor = null;
         }
diff --git a/Elwig/Windows/DeliveryAdminWindow.xaml.cs b/Elwig/Windows/DeliveryAdminWindow.xaml.cs
index 8f7aa4e..9ed81a2 100644
--- a/Elwig/Windows/DeliveryAdminWindow.xaml.cs
+++ b/Elwig/Windows/DeliveryAdminWindow.xaml.cs
@@ -122,7 +122,8 @@ namespace Elwig.Windows {
             Menu_Export_UploadSeason.IsEnabled = App.Config.SyncUrl != null;
         }
 
-        public DeliveryAdminWindow(int mgnr) : this() {
+        public DeliveryAdminWindow(int mgnr) :
+            this() {
             ViewModel.FilterMember = DeliveryService.GetMember(mgnr) ?? throw new ArgumentException("MgNr argument has invalid value");
             ViewModel.Title = $"Lieferungen - {ViewModel.FilterMember.AdministrativeName} - Elwig";
             ViewModel.EnableAllSeasons = true;
@@ -132,7 +133,6 @@ namespace Elwig.Windows {
             await base.OnInit(ctx);
             OnSecondPassed(null, null);
             SecondsTimer.Start();
-            LockInputs();
             if (ViewModel.IsReceipt) {
                 NewDeliveryButton_Click(null, null);
                 if (await ctx.FetchSeasons(Utils.CurrentYear).SingleOrDefaultAsync() == null) {
@@ -541,8 +541,6 @@ namespace Elwig.Windows {
 
             await RefreshList();
 
-            var d = DeliveryList.SelectedItem as Delivery;
-            var y = d?.Year ?? ViewModel.FilterSeason ?? Utils.CurrentYear;
             ControlUtils.RenewItemsSource(MemberInput, await ctx.FetchMembers(includeNotActive: !IsCreating, includeContactInfo: true).ToListAsync());
             ControlUtils.RenewItemsSource(BranchInput, await ctx.FetchBranches().ToListAsync());
             ControlUtils.RenewItemsSource(WineVarietyInput, await ctx.FetchWineVarieties().ToListAsync());
@@ -678,17 +676,19 @@ namespace Elwig.Windows {
         }
 
         private async void SearchInput_TextChanged(object sender, RoutedEventArgs evt) {
+            if (!HasContextLoaded) return;
             await RefreshList(true);
         }
 
         private async void SeasonInput_TextChanged(object sender, TextChangedEventArgs evt) {
-            if (ViewModel.FilterSeason == null || TodayOnlyInput == null || AllSeasonsInput == null) return;
+            if (!HasContextLoaded || ViewModel.FilterSeason == null || TodayOnlyInput == null || AllSeasonsInput == null) return;
             TodayOnlyInput.IsChecked = false;
             AllSeasonsInput.IsChecked = false;
             await RefreshList();
         }
 
         private async void TodayOnlyInput_Changed(object sender, RoutedEventArgs evt) {
+            if (!HasContextLoaded) return;
             if (TodayOnlyInput.IsChecked == true && AllSeasonsInput.IsChecked == false) {
                 ViewModel.FilterSeason = Utils.Today.Year;
                 ViewModel.FilterTodayOnly = true;
@@ -697,6 +697,7 @@ namespace Elwig.Windows {
         }
 
         private async void AllSeasonsInput_Changed(object sender, RoutedEventArgs evt) {
+            if (!HasContextLoaded) return;
             if (AllSeasonsInput.IsChecked == true) {
                 SeasonInput.IsEnabled = false;
                 ViewModel.FilterSeason = null;
diff --git a/Elwig/Windows/DeliveryAncmtAdminWindow.xaml.cs b/Elwig/Windows/DeliveryAncmtAdminWindow.xaml.cs
index 321f32e..c2d8b06 100644
--- a/Elwig/Windows/DeliveryAncmtAdminWindow.xaml.cs
+++ b/Elwig/Windows/DeliveryAncmtAdminWindow.xaml.cs
@@ -39,10 +39,6 @@ namespace Elwig.Windows {
             ViewModel.FilterOnlyUpcoming = true;
         }
 
-        protected override async Task OnInit(AppDbContext ctx) {
-            LockInputs();
-        }
-
         private void Input_KeyUp(object sender, KeyEventArgs evt) {
             if (sender is not Control ctrl) return;
             if (evt.Key != Key.Enter) return;
@@ -193,6 +189,7 @@ namespace Elwig.Windows {
         }
 
         private async void DeliveryScheduleList_SelectionChanged(object sender, RoutedEventArgs evt) {
+            if (!HasContextLoaded) return;
             await RefreshList();
             if (DeliveryScheduleList.SelectedItem is DeliverySchedule s) {
                 Menu_DeliveryAncmtList_SaveSelected.IsEnabled = !IsEditing && !IsCreating;
@@ -214,11 +211,13 @@ namespace Elwig.Windows {
         }
 
         private async void OnlyUpcomingInput_Changed(object sender, RoutedEventArgs evt) {
+            if (!HasContextLoaded) return;
             await RefreshDeliveryScheduleList();
             await RefreshList(true);
         }
 
         private async void FromAllSchedulesInput_Changed(object sender, RoutedEventArgs evt) {
+            if (!HasContextLoaded) return;
             if (ViewModel.FilterFromAllSchedules) {
                 DeliveryScheduleList.SelectedItem = null;
             } else if (DeliveryScheduleList.SelectedItem == null) {
@@ -228,11 +227,12 @@ namespace Elwig.Windows {
         }
 
         private async void SearchInput_TextChanged(object sender, TextChangedEventArgs evt) {
+            if (!HasContextLoaded) return;
             await RefreshList(true);
         }
 
         private async void SeasonInput_TextChanged(object sender, TextChangedEventArgs evt) {
-            if (ViewModel.FilterSeason == null) return;
+            if (!HasContextLoaded || ViewModel.FilterSeason == null) return;
             ViewModel.FilterOnlyUpcoming = false;
             await RefreshDeliveryScheduleList();
             await RefreshList();
diff --git a/Elwig/Windows/DeliveryScheduleAdminWindow.xaml.cs b/Elwig/Windows/DeliveryScheduleAdminWindow.xaml.cs
index 110d064..b7eed50 100644
--- a/Elwig/Windows/DeliveryScheduleAdminWindow.xaml.cs
+++ b/Elwig/Windows/DeliveryScheduleAdminWindow.xaml.cs
@@ -33,10 +33,6 @@ namespace Elwig.Windows {
             ViewModel.FilterOnlyUpcoming = true;
         }
 
-        protected override async Task OnInit(AppDbContext ctx) {
-            LockInputs();
-        }
-
         private async Task RefreshList(bool updateSort = false) {
             var vm = ViewModel;
             var cursor = Mouse.OverrideCursor != null;
@@ -124,15 +120,17 @@ namespace Elwig.Windows {
         }
 
         private async void OnlyUpcomingInput_Changed(object sender, RoutedEventArgs evt) {
+            if (!HasContextLoaded) return;
             await RefreshList();
         }
 
         private async void SearchInput_TextChanged(object sender, TextChangedEventArgs evt) {
+            if (!HasContextLoaded) return;
             await RefreshList(true);
         }
 
         private async void SeasonInput_TextChanged(object sender, TextChangedEventArgs evt) {
-            if (ViewModel.FilterSeason == null) return;
+            if (!HasContextLoaded || ViewModel.FilterSeason == null) return;
             ViewModel.FilterOnlyUpcoming = false;
             await RefreshList();
         }
diff --git a/Elwig/Windows/MainWindow.xaml.cs b/Elwig/Windows/MainWindow.xaml.cs
index 0cf7e89..fb20c90 100644
--- a/Elwig/Windows/MainWindow.xaml.cs
+++ b/Elwig/Windows/MainWindow.xaml.cs
@@ -41,6 +41,7 @@ namespace Elwig.Windows {
         }
 
         protected override async Task OnInit(AppDbContext ctx) {
+            await base.OnInit(ctx);
             if (Utils.HasInternetConnectivity()) {
                 CheckSync(200);
             }
diff --git a/Elwig/Windows/MemberAdminWindow.xaml.cs b/Elwig/Windows/MemberAdminWindow.xaml.cs
index 53e45dc..7788c19 100644
--- a/Elwig/Windows/MemberAdminWindow.xaml.cs
+++ b/Elwig/Windows/MemberAdminWindow.xaml.cs
@@ -83,11 +83,8 @@ namespace Elwig.Windows {
             Menu_Export_UploadFilters.IsEnabled = App.Config.SyncUrl != null;
             Menu_Export_UploadAll.IsEnabled = App.Config.SyncUrl != null;
             ViewModel.ShowOnlyActiveMembers = true;
-        }
 
-        protected override async Task OnInit(AppDbContext ctx) {
             UpdateContactInfoVisibility();
-            LockInputs();
         }
 
         public void FocusMember(int mgnr) {
@@ -334,7 +331,7 @@ namespace Elwig.Windows {
         }
 
         private async void ActiveMemberInput_Changed(object sender, RoutedEventArgs evt) {
-            if (!IsInitialized) return;
+            if (!HasContextLoaded) return;
             await RefreshList();
         }
 
@@ -491,6 +488,7 @@ namespace Elwig.Windows {
         }
 
         private async void SearchInput_TextChanged(object sender, RoutedEventArgs evt) {
+            if (!HasContextLoaded) return;
             await RefreshList(true);
         }