After update cpu is very high?

Hello
after updating my raspberry pi to version :

the cpu is very high
Load: 4.52 4.82 4.68

and sometime I get DNS error when I try to enter websites (even simple one like google)
what can I do?
up until now everything was OK - without any problem

Thanks,

There are many processes on the Pi that use the CPU. The dashboard reports total load, not the load produced by Pi-hole alone.

Take a look at the output of this command and see which processes are using the CPU the most:

htop

I found the problem...
some other code had a memory issue or something

Thanks ,