I am also running MyMedia as a docker in UnRaid. I had similar issues in the past. I'd ask Echo to open MyMedia and I would get that it wasn't running. It would happen randomly. Usually if I asked a second time it would work. Other times I would try to open the MyMedia webGUI and it would not respon...

Any news on this?

Sorry for the late reply. I never saw a notification.
The file was scanned through watched folders. I'll grab the log and upload it. I could not attach, it siad the file was too big. Here is a DropBox link.
https://www.dropbox.com/s/1jo8oe7qhje9e ... 0.zip?dl=0

I have songs with accent letters such as "Agua Salá" from the group "Bomba Estéreo". The songs will fail to play. I get a streaming error. I can not skip the track as the playlist just gets stuck on that song.