I also have the same problem now on Pop!_OS 20.04 after installing some updates. I suspect libasound2:amd64 (1.2.2-2.1ubuntu2, 1.2.2-2.1ubuntu2.1) beeing responsible, since this is the only sound related update that I installed today.
I also tried 20.10 two weeks ago and had the exact same issue there, so I went back to 20.04 ...
I also have the same problem now on Pop!_OS 20.04 after installing some updates. I suspect libasound2:amd64 (1.2.2-2.1ubuntu2, 1.2.2-2.1ubuntu2.1) beeing responsible, since this is the only sound related update that I installed today.
I also tried 20.10 two weeks ago and had the exact same issue there, so I went back to 20.04 ...