Figured bass figures not advising autoplace
See enclosed score. The figures overrun the vertical frame (whose top margin is 0).
OS: macOS Mojave (10.14), Arch.: x86_64, MuseScore version (64-bit): 18.104.22.16877, revision: 66b30c3
If you flatten that note one, then, two, then three degrees, or back, MS oscillates between "seeing" the figures and not.