Can someone try and explain to me how or why an EPG would cause video playback to freeze while audio continues to play?

Since Vipers EPG has been down I've tried a few different EPG links, provided by users here, and for some reason when I use AcidJesus' guide, and choose a live stream via PVR, video playback will freeze while the audio continues to play. However, when I switch to Ken's the issue virtually disappears and PVR Live Stream playback is smooth with minimal or no freezing/stuttering. I would prefer to uses Acid Jesus' EPG instead of Kens as Acid Jesus' EPG has a lot more channel listings.

It doesn't make sense to me, as I thought the EPG was just the guide, and has nothing to do with the actual stream being provided by the IPTV service provider. Any thoughts or feedback would be welcomed to help me further troubleshoot the problem going forward.

Thanks in advance!