Game bogs down over time

There are times as I play that the game over time, it starts to chug for no reason. Admittedly, at times, suspicious timing (About to win vs opponent/Winning Board in BG). But tin hats aside.

I’m running scan/repair right now and that does “fix it” temporarily for maybe a few weeks, but I only experience this on my PC, not my phone (Android), not my tablet (iPad)