Recently the TV in the living room has been having connection issues and I can't figure out why. It's a new (3months) old TCL roku 55in. I believe it's the 55P605. Anyways, lately it's been having connection issues even though my phone and computer and other wifi connected stuff isn't. The modem in on a shelf below it and the router is behind it so range is definitely not the problem. But when I'm watching things it will stop playing and just load or buffer then continue playing. Other times it will randomly make me sign back into Hulu or Netflix or whatever. I have 2 networks I can connect to in the house and it does this on both networks. Any ideas why this is happening and what I can do to fix it?

Does it have an Ethernet Port? Try a wired connection.