Random audio dropouts?

I have only noticed it on the two Bally Sports Florida channels.
It only happens on recordings, played back through the web server player. My Firestick 4K plays back the same recording fine. It also plays back fine on the same PC and audio device using Plex. This only started happening recently but I am not sure if it coincided with the switch from Fox Sports Florida to Bally Sports. I never had an issue previously with FSF or Sun Sports Florida. It doesn't happen if you watch live, audio only drops if you are watching recordings.