When running my Android APP on Android 7.x GUI Elements are disappearing

My Android APP runs fine on Android Version 5.0.2. But if i run the same APP on serveral Devices with Android 7.x The App works finde on first start but after restarting the APP some GUI Elements are disappearing. In my case 2 Images in my Listview Layout. Does anyone have a clue why this could happen? 

The images are stored in an ImageList.

I use Rad Studio 10.2 with all released Hotfixes for Android.

This is the Code i use to assign the images:

if Assigned(TmpProfile) then
        case TmpProfile.Status of
          Connected:
          begin
            //TListItemImage(ListView1.Items[I].Objects.FindDrawable('Image3')).Bitmap := ImageList1.Bitmap(TSizeF.Create(128,128), 0);
            TListItemImage(ListView1.Items[I].Objects.FindDrawable('Image3')).Bitmap := ImageList1.Bitmap(RectListViewImage3, 0);
            StatusStr := 'Connected';
          end;
          Disconnected:
          begin
            //TListItemImage(ListView1.Items[I].Objects.FindDrawable('Image3')).Bitmap := ImageList1.Bitmap(TSizeF.Create(128,128), 1);
			      TListItemImage(ListView1.Items[I].Objects.FindDrawable('Image3')).Bitmap := ImageList1.Bitmap(RectListViewImage3, 1);
            StatusStr := 'Disconnected';
          end;
          Connecting:
          begin
            //TListItemImage(ListView1.Items[I].Objects.FindDrawable('Image3')).Bitmap := ImageList1.Bitmap(TSizeF.Create(128,128), 2);
            TListItemImage(ListView1.Items[I].Objects.FindDrawable('Image3')).Bitmap := ImageList1.Bitmap(RectListViewImage3, 2);
            StatusStr := 'Connecting';
          end;
          else
          begin
            //TListItemImage(ListView1.Items[I].Objects.FindDrawable('Image3')).Bitmap := ImageList1.Bitmap(TSizeF.Create(128,128), 3);
            TListItemImage(ListView1.Items[I].Objects.FindDrawable('Image3')).Bitmap := ImageList1.Bitmap(RectListViewImage3, 3);
            StatusStr := GetErrorMessage(TmpProfile.Status);
          end;
        end;

Is there someone with similar problems?