RouterBOARD 941-2nD V6.48.3 get 100% CPU after power down

Hello,
I have a strange issue
I’m using RouterBOARD 941-2nD V6.48.3 for a long time
up unti 2 days ago - everything work without any problems
2 days ago I had a power down for 5 min
from that time my router is working very slow , WiFi clients get disconnected (I have around 4 devics connectd using , no more the 10 Mbps max download all together)
I have connected using cable and I see the the CPU is around 100% for a long time (and I also get disconnect)
what could be the reason ?
didn’t change any setting
no unknown entries


today for examle everything work just great for 8 hours , then in the last 1 hour it was 100% for almost 30 min

what can I search for?
is there any logs I can save that can help me undrstand ?

Thanks ,

Run /tool/profile
and see what is taking up the CPU. If you have an export you can post that as well.