Mine is a 200 Mbps ACT connection. Router is below the TV. My issue is with the highlights. I'm attaching videos to showcase the issue. Steps to reproduce.
1. Select any video from the WPL highlights section
2. After the video starts playing, try using forward/rewind
3. Also click down to bring the seek bar and try forward with the seek bar.
Android TV:
Source
Fire TV:
Source