Failure of changing tempo when MM rests are enabled

Version 2.3 / Windows7

1) Default "Untitled" Score
2) Enter a few notes eg in measure 5
3) Select first measure -> Add a tempo marking (eg with shortcut Alt + T, so quarter note = 80)

The test file at this step: tempo test.mscz
4) Press "M"
5) For checking: display Play panel -> Rewind to start position, and launch playback

First result: as expected

6) MM rests always enabled: Change the tempo value, let's say to 100
7) Rewind to start position (you note the new tempo marking is not updated in Play panel), and so, when launching again playback, it's wrong.

• For avoiding this behaviour: change the tempo by disabling, first, the MM rests.