FLAC files refuses to play on Sonos

Plex Players Streaming Devices
1

Server Version#: lastest public
Player Version#: latest

Hi, I have issues when playing FLAC files from Plex to my Sonos. When playing mp3 files everything is working fine. If I hit the play button the Sonos app gives a error something Plex lost connection. I’m still investigating. More people having this issue?

2

It seems that Plex does something with the files when it does maintenance during the night. When then that is done the files plays fine. Add I new files, you guess they don’t play. Maintenance is done ,and it works!