I have the same issue for the last 2 months at least. Used to work fine prior to that and I have not changed settings or added any apps/programs that could have a compatibility problem. My guess is that it's an incompatibility between the latest and even more degraded Zoom client and the the latest/next and more degraded Microsoft system updates that either company doesn't want to address given how few people complain about it. Not a problem with the phone app, which is why I think it is a Zoom/desktop operating system irreconcilable difference.