Issues with playing dvr and live tv on fire stick

Recently I have been having a lot of issues playing content from both my fire tv stick as well as my fire tv when it comes to the Xfinity stream app. Other content provider apps work without issue. 

The issues are that when selecting a show from my DVR or from the TV go channels, it will take a long time to download and kickoff the process and once it finally starts to play the content, it will play for 2 seconds and then pause and act like it’s buffering. 

I am able to play the same shows from the same network in the same room on my iPhone app or my laptop using chrome. When playing content on my iPhone app, it downloads and plays without buffering in ~5 seconds. Whereas it takes a minute or so on the fire tv or stick to start trying to play the show and immediately goes into what seems to be buffer mode. 

I have ran network speed tests on both devices and they are both getting ~120 Mbps down and 16 Mbps Up. My DVR is located at a different location hence why I’m trying to use the stream app to playback content from the DVR. 

I have reinstalled the app with latest 6.20 version as well as factory reset both fire devices to see if that would help. 

Any ideas on troubleshooting or next steps for isolating why fire devices are struggling to playback content when the network doesn’t seem to be an issue?