A recent studio update has caused my CPU usage to be 100% on my 2018 MacBook Pro, causing it to get extremely hot and really laggy - even on an empty baseplate.
Here are my system specs:
This also happened on macOS Catalina 10.15.3, I updated to 10.15.4 yesterday.
Here is a screenshot of the CPU usage:
My studio build version: 0.425.0.394331