Crashing when deleting Layout Tabs

I’m consistently crashing Rhino (22th November version) when deleting Layout Tabs.

This happens only when keyboard input is used as the method for deleting them.

That is:

RMB click on a layout tab:

Hit the D key (as many times as necessary) to highlight Delete.
Hit Enter
Hit the Y key to confirm deletion.

When all layout tabs have been deleted, Rhino goes down after popping up this dialog:

Hi Wim - thanks, I’ll check it.
Hm. So far, no luck.