PI not showing end device CPU utilization or Prime CPU utilization.
Prime able to sync with the device - is the Prime has reachability to end switches.
cisco 9200 - the code running was having some bugs, so worth upgrading to 17.3.X and testing it.
If you like to keep the same IOS XE code, reboot Prime and check is that fix issue, or reboot the switch 9200(before reboot check any abnormal Logs in the switch)