Random "Bad connection" issue on Roon Arc

It happens from time to time that Roon Arc is unable to play local files from the server, and displays a “bad connection” error. I can still play tracks from streaming services (Qobuz) though.
I don’t have this issue when on Wifi, but since I use Roon Arc on the go, this is not a solution. The only way I found to work is to reboot the server when I get back home.