6.43, Linux
Reaper crashes when right clicking a menu on a plugin embedded in the MCP - and then clicking away without selecting a menu item.
It is somewhat intermittent, but I have been able to reproduce it a few times.
Here is a gif demonstrating the crash (might need to view in fullscreen to see clearly):
https://imgur.com/a/tAk55tR
Crash results in the following error:
'reaper' terminated by signal SIGSEGV (Address boundary error)
I've attached a minimal project file to this post.