Reproducible crash on adding courtesy accidentals

I've put a piece into MuseScore Studio 4.4.4 on Windows 11, and I usually leave courtesy accidentals until the end, so I went to add them with the plugin, but MSS crashed. I reopened the file, and tried again, but every time I try to use the configure part of the courtesy accidentals plugin, MSS exits.

I've reinstalled MSS, deleted the plugins from my user Documents folder, and tried on another machine and in every case, while I can use the Add command to get bare accidentals, using the Configure window always causes a crash.

I've tried to reproduce this with a blank new score for a minimal test case, but it seems to work with just two notes in the score!

Any ideas on what's going on here? Should I report a bug on GitHub?