Apple ios TVE/Single Channel Issue

I have recently (past few weeks) started having issues with the local CBS affiliate/WUSA on TVE (DirectTV). Both the live feed and the recordings frequently stutter while playing - very choppy to watch. This only happens on my ios devices and not on my firesticks - the firesticks play fine.
Also, I'm not having any other local TVE channel issues.

I've tried restarting and re-downloading the Channels app on the Apple TVs, updating and restarting the server itself, plus I tried to mess around a bit with some of the settings for those specific clients - all without any success.

Is anyone else having this issue or have an idea what might be going on?
Thanks