I have the Tablo lite, works great on one Roku, never have to reset. 2 nd tv with same Roku device, always shows cannot connect. I unplug Tablo, wait few minutes and it works great until I watch Netflix or Sling, the. Same thing all over. The first tv never fails to connect.
If it’s a Roku device and not a TV why not reboot the Roku and see if that clears the problem.
I have a 4200 Roku connected via 5g WiFi and this seems to happen every day or two under long continuous usage for the last 2 years.
It starts by the app needing to reconnect which fails and since I have multiple tablo unit if you disconnect the unit the search for any tablo fails. My situation is probably a build up of sockets that haven’t had time to complete the shutdown. And I don’t feel like waiting the 3-5 minutes to see if they complete the shutdown.