Crash when swapping out bags with different inventory slot colors

[Deviator]

Steps to produce...

Copy miningbag.json to miningbagnew.json

In the new file, change the code: to miningbagnew

Change the slotBgColor (leaving the color the same does not cause crash)

Open game, open inventory screen (inventory screen closed does not cause crash) then swap the 2 different bags in the backpack slots

Running on 64 bit Windows with 16 GB RAM 
Version: v1.14.8 (Stable)4/9/2021 8:47:24 AM: Critical error occurred
System.Collections.Generic.KeyNotFoundException: The given key was not present in the dictionary.
   at System.ThrowHelper.ThrowKeyNotFoundException()
   at System.Collections.Generic.Dictionary`2.get_Item(TKey key)
   at Vintagestory.API.Client.GuiElementItemSlotGridBase.RenderInteractiveElements(Single deltaTime)
   at Vintagestory.API.Client.GuiComposer.Render(Single deltaTime)
   at Vintagestory.API.Client.GuiDialog.OnRenderGUI(Single deltaTime)
   at Vintagestory.Client.NoObf.GuiManager.OnRenderFrameGUI(Single deltaTime)
   at Vintagestory.Client.NoObf.ClientEventManager.TriggerRenderStage(EnumRenderStage stage, Single dt)
   at Vintagestory.Client.NoObf.ClientMain.TriggerRenderStage(EnumRenderStage stage, Single dt)
   at Vintagestory.Client.NoObf.ClientMain.RenderToDefaultFramebuffer(Single dt)
   at _jeEziyUSYl0BpbOxT46FYwj5VWL._IIIrDcgMyMKwpTkEZsHikpfl3dh(Single )
   at _idIkJkIueHHf3Oz2WNlBdD0E1XR._DvzT6D0wN3fMakeuDyljJJ09hok(Single )
   at _idIkJkIueHHf3Oz2WNlBdD0E1XR._V5piYzG7beYPldE6UVxY58dqacE(Single )
   at Vintagestory.Client.NoObf.ClientPlatformWindows.window_RenderFrame(Object sender, FrameEventArgs e)
   at System.EventHandler`1.Invoke(Object sender, TEventArgs e)
   at OpenTK.GameWindow.RaiseRenderFrame(Double elapsed, Double& timestamp)
   at OpenTK.GameWindow.DispatchRenderFrame()
   at OpenTK.GameWindow.Run(Double updates_per_second, Double frames_per_second)
   at _YrS2W1MoaeqC4xqH8ItdZB6vADN._8t1BmEWVlCT9mjx5M0vFIzU9tif(_7T00Rjby4si0wyEBez5dXNqLm7h , String[] )
   at _ejKuc6cg0k8V39o8jDIzquyczbO._8t1BmEWVlCT9mjx5M0vFIzU9tif(ThreadStart )
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[Deviator]

After more testing, it looks like this only happens if the quantitySlots are the same between the bags AND the slotBgColor is different for each bag. Still not sure what might be causing this.