Logic 2.4.22 is markedly slower on MacOS (Sequoia 15.3) than previous releases I’ve had, and uses around 100% of a CPU when it’s sitting idle.
I’m not sure which version this issue was introduced, but sometime in the last 3 months or so feels about right.
The WindowServer high CPU seems related. Note: This machine is connected to a DisplayLink display, and I’ve seen other weird cases where this was part of high CPU usage issues. I have not seem it with Logic software before though.