Coming from 10.5, I updated to Cubase 11 in the hope that this issue would have been resolved. Unfortunately that was not the case.
This can happen at any time. Here are the two most common scenarios:
Immediately after startup, when the Hub window shows. This happened three times this morning (all after fresh reboots), on the fourth attempt, it worked.
After a period of use, often when I leave Cubase open to go do other things. When I come back to Cubase, the UI is completely frozen. In this case, it can always receive MIDI input (I can hear playback and play notes).
I always have to force quit the application. I have tried clearing out all preferences, both the ones generated by Cubase 11 and older from previous Cubase versions. This did not fix the problem.
Crash dump (this one is from “hung window at startup”): Gofile - Free file sharing and storage platform
OS: Windows 10
CPU: AMD Ryzen 7 2700X
RAM: 32 GB
GPU: nVidia GeForce GT 710 (latest driver)
Audio: Steinberg UR22 mkII (latest driver)
Lastly a friendly suggestion; if you want people to upload crash dumps, perhaps you should up the file size limit on this forum, or provide some kind of file upload service?