Since the April 15th update, I'm now getting 100% CPU usage for around 10-20 seconds, every 5 minutes. I was alerted to this happening because the cursor froze on the screen and the fans came on loudly.
I'm using a brand new 2021 iMac, this is a top spec machine, nothing else running in the background. This started immediately after I installed the update.
What has changed that would result in this? What can I disable?