Description of problem:
Unplugging a webcam (046d:085c Logitech, Inc. C922 Pro Stream Webcam) causes the "/usr/bin/pipewire-media-session -d bluez5" process to go into a hot loop trying to read from the sound control associated with the camera (the camera has a microphone):

strace:
```
[...]
read(19, 0x7ffd068ca9d0, 72)            = -1 ENODEV (No such device)
epoll_wait(3, [{EPOLLERR|EPOLLNVAL, {u32=2591091504, u64=94169749056304}}], 32, -1) = 1
read(19, 0x7ffd068ca9d0, 72)            = -1 ENODEV (No such device)
epoll_wait(3, [{EPOLLERR|EPOLLNVAL, {u32=2591091504, u64=94169749056304}}], 32, -1) = 1
read(19, 0x7ffd068ca9d0, 72)            = -1 ENODEV (No such device)
epoll_wait(3, [{EPOLLERR|EPOLLNVAL, {u32=2591091504, u64=94169749056304}}], 32, -1) = 1
read(19, 0x7ffd068ca9d0, 72)            = -1 ENODEV (No such device)
epoll_wait(3, [{EPOLLERR|EPOLLNVAL, {u32=2591091504, u64=94169749056304}}], 32, -1) = 1
read(19, 0x7ffd068ca9d0, 72)            = -1 ENODEV (No such device)
epoll_wait(3, [{EPOLLERR|EPOLLNVAL, {u32=2591091504, u64=94169749056304}}], 32, -1) = 1
read(19, 0x7ffd068ca9d0, 72)            = -1 ENODEV (No such device)
epoll_wait(3, [{EPOLLERR|EPOLLNVAL, {u32=2591091504, u64=94169749056304}}], 32, -1) = 1
[...]
```

lsof:
```
[...]
pipewire- 17308  sun   17u     unix 0x00000000e80db616      0t0   383573 type=STREAM
pipewire- 17308  sun   18u     unix 0x00000000368e9d3c      0t0   383574 type=STREAM
pipewire- 17308  sun   19u      CHR             116,13      0t0   299728 /dev/snd/controlC1 (deleted)
pipewire- 17308  sun   20u     unix 0x00000000c8abce84      0t0   383566 type=STREAM
pipewire- 17308  sun   21u     unix 0x00000000c8abce84      0t0   383566 type=STREAM
[...]
```

both /usr/bin/pipewire and /usr/bin/pipewire-media-session need to be killed to recover.

Version-Release number of selected component (if applicable):
pipewire-0.3.7-2.fc32.x86_64

How reproducible:
Always