My FireTV just developed an issue and it appears to affect network connectivity. It had been flawless for a while but actually popped up with a message saying " if this persists, contact customer service..." It better be something simple and I haven't even had time to troubleshoot it. Basically it forgets my network and comes up saying it can't connect. Then I "force" connect it and it does, but it won't stream consistently.
Switched over to the PS4 and it streams the same things fine, so it isn't my network.