Yeah they pushed out a new version 4.0.26 a few weeks ago and Tennis TV is no longer logged out when a Live match is in progress. Also, when there is a Live match in progress the fast forward and fast reverse now work from my Roku remote. The fast forward and fast reverse do not work when accessing the Tennis TV app commands (10s, 1m, 5m, 10m) however.
When watching a match REPLAY the fast forward and fast reverse do not work either via the Roku remote nor the Tennis TV app commands (10s, 1m, 5m, 10m). I reached out to Tennis TV support and they indicated they were working on it. I really most care about being able to forward/reverse on replays. Are you saying ARE able to forward/reverse on replays?