I'm planning on upgrading to from NSM 18.104.22.168 to NSM 22.214.171.124, has anyone upgraded to this release and have you encountered any issues not documented in the Known Issues list?
Network Security Platform 8.2.x Known Issues
I have upgraded NSM from 126.96.36.199 to 188.8.131.52. There aren't any issue happens as the known issues list. But there is an issue happen when I upgrade the sensor OS (model: NS7200 failover pair) from 184.108.40.206 to 220.127.116.11. However, after reboot, the sensor still connect to NSM successfully. I don't know what that.
Did the error clear after you rebooted the sensor?
I already have my NS series sensors running on 18.104.22.168 software so hopefully won't run into this issue.
I can't say I've seen that reported by other customers, so if the reboot doesn't solve the issue, gather a sensor trace and open a support ticket.