Some people (including myself) have had some very difficult to debug networking issues with mediasoup on alpine-linux. I think it has something to do with UDP support in libuv on alpine. I’m not sure if the bug is with libuv or alpine, but switching to the standard ubuntu-based docker image for node fixes it.
It’s possible this doesn’t happen anymore, but wanted to give you a heads up just in case. There’s more information in these threads: