musescore 3 switches to treble clef after opening Staff properties and clicking OK (probably rare bug)

Steps: open the enclosed file 2.mscz in musescore 3, right click on the 3rd or 4th staff -> select Staff Properties -> click OK (you don't have to modify anything) -> see what happens with the notes (as if the clef has been changed to the treble clef)

I encountered this behaviour when dealing with a score exported from sibelius and saved in musescore 2.
I wasn't able to reproduce this bug with a new score.
OS: Windows 10 (10.0), Arch.: x86_64, MuseScore version (64-bit): 3.0.0, revision: ef48b60