My first session was ridiculous, it crashed like three times for nothing.
I figured, yeah, this is one o' those point zero versions same as it ever was, I'll have to wait. So I went back to using 10.5.2, which now was performing poorly. So, why not, opened the project in 11 (the saved in 11 project opened in 10.5 btw) and it's been perfectly stable since, many sessions ago. I don't know. If I were more clever I will have figured out the crash I now grok long before I did, and it isn't likely to be anything you're experiencing (OS + audio interface + VE Pro + Cubase = clusterfuck; excessive wake up calls* I don't understand at a low level but correlation to crashes is 1:1. Solution = open project with the audio interface turned off. *: If the project is running and my display sleeps, project will crash on launch next time. <Doctor, it hurts when I do this/So stop doing that> diagnosis, but what can ya do).