@pascal , @john.ohran is on the right track. When the command’s options’ width exceeds the command window’s width, _PopUpToolbar stops working. Here it continues working after _Purge:
But it stops once the command window is too narrow to show the entirety of _Purge’s options:
I set _OneView when Rhino opens:
And because I was testing a narrow command window, PopUpToolbar didn’t work at all. The same applies to hand-typed commands. _PopUpToolbar is working fine until I make the window too narrow for _Offset’s options:
