3.4.1: Figured bass "_" as a figure doesn't work at all.
OS: macOS 10.15, Arch.: x86_64, MuseScore version (64-bit): 3.4.1.25011, revision: 20414b2
Any entry of an underscore as a figure (for "same chord continue") fails; it disappears at the end of the entry.
Comments
See #300693: Figured bass continuation not drawn to end note in voice > 1