cnMatrix 100% CPU Usage

Hi checking if anyone here has had issues with cnMatrix switches sit at 100% usage
I have 2 at a remote site pegged at 100% whilst all the other cnMatrix switches look fine.

Funnily enough device uptime on the affected units is sitting at the thousands of days which is impossible

show system int
49474 Days 6 Hrs, 7 Mins, 44 Secs

show env cpu
CPU Threshold : 100%
Current CPU Usage : 100%

I take it a reload is in order ?

The units in question are not on the latest 4 release firmware as of yet.
Site accessibility is kinda remote and client does not like unplanned or untested updates on their systems.

Dont know will help at all but still…