Based on other posts on both the general and beta forums, and from my personal experiences (not saying much, but this is more than a single isolated incident), there is most definitely a bug in the GA17 code. Multiple devices that were upgraded to XGv17, become unstable after about 2 days, to the point were the GUI and CLI will not allow me to sign into the devices. The only way to resolve is to reboot the devices. I've been using the Sophos SSL VPN for the bulk of the day today, and then became randomly disconnected. Upon investigation, the firewall is now in a locked state and won't even allow me to reconnect to my SSLVPN. After a reboot, all issues go away, and then it turns into a waiting game again. RC1 I didn't seem to have these issues. The second device was on 16.5-MR8 and upgraded to GAv17, and has the same issues, so this is not related to a particular upgrade path a device has had.