Teams swallows an entire core if I have a video conf with more than 3 or 4 others with video active. The Vpn client then uses up half of another. Often I can't

Teams swallows an entire core if I have a video conf with more than 3 or 4 others with video active. The Vpn client then uses up half of another. Often I can't do anything with my laptop whilst on one of those calls - including using teams itself because the UI just grinds to a halt. Weirdly it isn't GPU bound at all, my GPU is basically idling the entire time.