Latest Plex Server Update - Buffering Issues During Playback on TVs

Server Version#: 1.43.3.10828
Player Version#: Latest Plex App (Amazon Fire TVs)

With the latest server update, streaming to Amazon FireTV (using the latest plex app), is problematic. Videos play but immediately start buffering. The issue also happens when using the browser on the TVs. Where I don’t see an issue is with playing the video on the server and screen mirroring the video to any of the TVs.