Stuck "Start group" option

Directory Opus Pro 12.22 Build 7593 x64
OS 10.0 (B:19041 P:2 T:1) SP 0.0

See the attached video.
I go to Customize mode, uncheck Start group for "Odstęp" spacer and accept change.
Then I go back to Customize mode and the option is back.

This seems to happen not only for spacer, and it seems to me sometimes when I set Start group for a toolbar element, it is set for a neighbouring item instead.

Can you zip up that toolbar file and attach it (assuming there's nothing private in the comnands/paths/etc. it uses)?

Here it is. A bit messy, because it is a draft toolbar. You can play with Start group of visible items to observe the issue.

Pasek gó (6.9 KB)

Many thanks!

We've fixed that for the next update. The Properties FORMATLIST command would always add a separator after itself, even when there shouldn't be one.