Our issue is a bit different, however I thought I'd add this info in case it rings any bells with someone else.
I have 4 TV's, 2 of which are hardwired-to-network Hisense Roku TV's, and 2 others that use a Roku stick on Wifi, and work flawlessly.
The Hisense TV's have a few issues that may or may not be Roku, or TV, or network, or signal provider issues. Part of the "fun" is of course trying to get one party to admit "It's us!".
Occasionally at startup, even though we are hard-wired to the network, the TV will state "Not Connected", but will auto-connect after a few seconds. This may be by design or "normal", I'm not sure, but it's interesting.
Also sporadically, like maybe once or twice per month, the TV just locks up, the remote does not respond, and after 20-40 seconds it restarts. Fine after that.
Our TV signal (and Internet) comes from vMedia. When the TV is using the ROKU channel, or any others like Fawesome, Filmrise, Tubi, TED, (etc) or the Antenna, it behaves fine. But in the morning, when accessing live TV via the vMedia app, it starts the menu at the Time setting of last night, (e.g.) 11 PM or whatever, instead of advancing the menu to (e.g.) 7:30 AM or whatever the current time is. Hitting the reverse arrow twice 🙂 resets the menu time, and off we go.
I know this sounds trivial, but before we were able to track and duplicate this behavior clearly, much frustration was 'enjoyed' hitting buttons and yelling bad words, for a couple of months. We even changed some Router settings, and every Roku adjustment under the sun. Nada.
Lengthy tests and fixes were attempted, but these 2 Hisense Roku TV's still behave this way. Annoying but not fatal.
Is this somehow network related? It's a mystery. But because it's only the Hisense-Roku TV's that exhibit this behavior, I suspect it's the Roku Built-in that is not quite as solid as the Roku Sticks, which behave reliably.
My next TV (not due anytime soon) will not have Roku built-in, but will use the stick or Roku box. I'd shoot for a hardwired network solution and avoid Wifi, although we have a 'good' signal. Supposedly...
Other comment about Hisense TV: we have had 3 replacements under warranty in the past 3-4 years. Thank you, Costco, even though the replacements were all made BEFORE the Costco extended warranty kicked in.
We still like the flexibility of Roku, but these wrinkles add negative excitement.
Who is to blame? We suspect a combination of factors. But Wifi is not one of them.
At this point, unless someone has a DEFINITIVE fix, I'm no longer interested in trouble shooting.
