I am running Zoom 5.8 on Ubuntu 20.04.3 LTS. Recently I started experiencing behavior where Zoom runs fine at first. Then after 30-45 minutes the video starts to freeze up for varying amounts of time that slowly increases. The audio comes through fine but the user interface also freezes up. When I run System Monitor I see that one of the four cpu cores is pegged at 100% while the video is frozen. When the core comes unpegged the video briefly unfreezes until one of the cores again pegs at 100%. The other three cores are running around 40-60% at the same time. This same system used to run fine on previous Zoom releases. Anyone have any suggestions?
The meetings are using live transcriptions. I have not had problems in other meetings without live transcriptions, but those meetings also have at most about ten participants and I spend most of the time in a breakout room with only two other people.