WindowServer taking crazy amount of CPU
Since I updated to macOS Monterey, every time I watch any type of video, especially in full screen, WindowServer goes crazy. Suddenly my 2020 MacBook Air 4 intel core 8 Go with tons of space on the drive gets sluggish, overheats and the fan goes in overdrive. It stays this way for a while after I stop watching vids unless I shut down the computer and manually restart it. Simply restarting it keeps it as is until it decides to calm down. I ran my antivirus and nothing has been found. I deleted all the apps I don't use, reduced transparency, did a NVRAM and SMC reset and nothing works. I read that Bartender app could be the cause of the issue so I deleted it. I saw a slight improvement but WindowServer still goes berserk within minutes of watching vids with no other window or app actively open. Same in safe mode. Any idea?
MacBook Air 13″, macOS 12.0