One of my tvs in the house only gets a few channels. Most of the channels gets error message of "lost connection,"
This is what I have tried:
Force stop, relauch app
Deleted app, reinstalled
Cleared cache
What else can I try?
This is likely a wifi signal issue at that particular TV
You can try enabling Tuner Sharing under app settings
Run a speed diagnostic from that TV vs. your others devices to see if there's a marginal difference in performance.