Ongoing crashes when working in key editor

Since a while I get crashes when working in the key editor. When that happens I get an error message and after that I can’t select multiple notes with the lasso function anymore. I can select a note by clicking directly on it though.
When I change the tool to something else like the pencil and back the lasso function works again but those squares you see on picture 1 stay on the screen. Even when I close the project those squares stay there until cubase is completely closed (pic 2).
I also have attached a crash log that was written when that happened. Maybe one can see the reason there…



Cubase 11.0.20.371 64bit 2021.5.18 17.31.37.061.dmp (1.3 MB)

Hi,

Reported to Steinberg. Thank you.

Thanks very much.
Can I do something to prevent this?
Am I maybe to quick with selecting?

Hi,

So far it’s not really clear, where does it crash for me, so I don’t know, what could you change in your workflow to prevent the crash, sorry.

Btw, Could you try in the Cubase Safe Start Mode [Disable preferences], please?