I've noticed for several weeks now my Macbook just bogging down whenever I need to do any real work. Yesterday I found the cause, BOINC was running when while I was actively using the computer. In fact, it's cranking away as I type this even though I have the "suspend when computer in use" checked.
It seems to start up randomly, and almost always when I am on a zoom call or watching a video on the browser, FWIW.

I stopped the program yesterday and when I restarted it things generally worked fine but today it's back to starting up randomly and sending the load avg to 200+, even when I open the app and click 'suspend' it is still running.

BOINC version 7.24.3