Guaranteed crash after dragging a block group with all blocks in sub groups to hotbar

Steps to reproduce:

1. Make a root block group from several blocks.

2. Make a sub block group from some of the blocks in the root group.

3. Make a second sub block group from the rest of the block in the root group.

4. Drag root group to hotbar => crash

Crash happens only when all blocks in root group are in sub groups.

ProcessOutput.log gives a hint what is going on there:

[ERR] Setting breakpad minidump AppID = 1133870
[ERR] SteamInternal_SetMinidumpSteamID: Caching Steam ID: XXX [API loaded no]
[ERR] System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection. (Parameter 'index')
[ERR] at System.Collections.ObjectModel.Collection`1.get_Item(Int32 index)
[ERR] at Keen.Game2.Client.UI.TerminalScreen.ControlPanel.ControlPanelViewModel.EditTile(ControlPanelGroupModel groupModel, ToolbarTileViewModel tile)
[OUT] CLR: Assert failure(PID 13480 [0x000034a8], Thread: 2084 [0x824]): !"Attempt to execute managed code after the .NET runtime thread state has been destroyed."
[OUT] File: D:\a\_work\1\s\src\coreclr\vm\ceemain.cpp:1827 Image:
[OUT] G:\SteamLibrary\steamapps\common\SpaceEngineers2\Game2\SpaceEngineers2.exe
[EXIT] -1073740286