RC-1: 4/2 beaming messed up
OS: macOS Mojave (10.14), Arch.: x86_64, MuseScore version (64-bit): 3.1.0.22356, revision: 8b1a7dc
In the master palette (and all derived from it), the beaming of 4/2 beams the entire measure together at all levels. This should be fixed before release; I imagine it's very easy.
Comments
You need to enter a bug report at https://musescore.org/en/node/add/project_issue?pid=1236. The Programmers look like they're monitoring it closely and quickly fixing regressions like this.
I see it at #289556: 3.1 RC1: 4/2 beaming messed up (regression) (probable user error/closed)