Bug : measure count increases when moving a rest

See https://www.youtube.com/watch?v=_FryMDvSZr4&feature=youtu.be .

When I move a rest in measure 9, it causes the measure count to change. Measure 7 becomes 8, and so on.
Basically, the pickup measure at the end of the second line, which is marked as "exclude from measure count", becomes part of the count again.

The only workaround I have found is to click that measure, uncheck "exclude from measure count", then check it again.

I have run into this issue repeatedly while editing my scores, and it's been driving me crazy, especially as I'm trying to match the measure numbers from another edition. When the measure counts go out of sync, transcription becomes very hard.

Is this a known bug in Musescore 3.4.2.9788 for Windows x64 ?

I will attach the file separately , since sometimes large files cause my posts to go to moderation and not post.

Edit: most other kinds of edits will cause this issue to happen as well.

Other odd thing : sometimes when pressing CTRL-S to save, the measure count changes also, in the other direction - ie. it fixes itself.