Roku 4 connection issue

Riddle me this. All of the sudden today my Roku 4 would not connect to Plex. It was throwing a relay connection error. I checked all the settings, rebooted the Ron, checked my TiVo connection and was fine so I know the plex server was working. Removed and re-added the plea app on the Roku 4 and still nothing. No matter what I did for about 15 minutes of troubleshooting made it work. So then I checked my Roku 3 and it connected and worked fine so I looked at its settings. Then went back to the Roku 4 and all of the sudden connected and started working???

Anyone have a clue as to what is going on?

Is your Roku connected wirelessly? If so try wired.

If you cannot try wired try setting your router to use channel 11 or 1 as you might have a sudden interference problem and those two channels are the best at being interference resistant.

Weird thing is the Roku 4 is connected wired and the Roku 3 is wireless. The 3 has never had problems. The 4 has given me issues before. Intermittent and frustrating.