Cubase 12.0.20 - Hangs when aborting audio export

I have a repeatable problem that Cubase 12.0.20 hangs when I abort an .mp3 audio file export.
I’m on Windows 11, project is mixture of vst instruments, audio and plenty of plug-ins - the project all runs fine. There is no Crash Dump file - I have to use Task Manager to shut the programme.

EDIT - it does eventually abort but takes a few minutes - I suspect this maybe exactly the same amount of time as doing an export!!