Sometimes an update brings out issues you didn’t experience before, but this doesn’t necessarily have to do with the OS version, but can also happen if you reinstall the currently running OS.
Therefore I don’t think this should be considered a separate issue to the one(s) reported before.
Please continue here for random crashes:
If you rather have random reboots then continue here:
There are some troubleshooting tipps in the first post of the reboots issue which might also help with the crashes.