I run 3 separate Ubuntu Server 22.04 Roon setups (routers: UDM Pro, UCG Ultra, AmpliFi). They never crash. Have you looked at the tail of the Roon log file right before the crash (before restarting Roon, it would be the tail of /var/roon/RoonServer/Logs/RoonServer_log.txt)? Does it show any error messages that might be relevant?
I will check next time if happens again. I saw that I had some ubuntu updates not installed so I did update, I am not so sure the issue was with Roon rather than Ubuntu itself
I keep having a system error that I cannot figure out and I don’t know if it is related to the Roon issues. I will give it another try and report if I manage to report something more clear