I'm interested to see what response you'll get from anyone at Roku, but I can pretty much predict it and can only say, don't get your hopes up. I don't have a 3800, but I do have a 3910 that exhibits this problem, although I don't recall if I tried my recently purchased Tablo on it. On my 3910, as long as I play a 720p video first, it displays properly (I can't say that I ever tried any 480p videos). Once I play a 1080p video, any 720p video plays in the upper left corner until a restart. This Roku bug has been going on for years through several firmware updates. In my case it was the HDHomeRun app where I first noticed the problem, but that wasn't the only one that had it. I wish I could try the Tablo app on the 3910, but I won't be able to for a while.
So here's my prediction:
You'll be asked for a picture and then some other information and asked if the problem goes away after a restart (which it does). At that point, it will be dropped or declared forwarded to some "group" and we'll never hear about it again.
As for upgrades, you can check to see if you have any offers at:
https://my.roku.com/upgrade/
UPDATE: I tried to delete almost all apps from my Roku sticks and yet the problem persists. So… maybe not memory related as had been suggested by Tablo as one possible cause of the issue.
UPDATE: I had a 45+ minute chat session with a Roku customer service representative.
It went like this: Change display from auto to 1080, Run software update, Restart Roku, Rep says try it now.
Tablo low-res channels look good showing full screen (very nice). Try movie on HBO Max app HD movie showing nicely. Go back to Tablo low-res channels now reverts to appearing in an unwatchable small box in upper left corner of screen with remainder of screen bright green background.
At this point my cell phone craps out and the chat with Roku rep is of course over.
So… looks like Roku’s fix is change display settings EVERYTIME you want to watch low-res Tablo channel.
That is not a fix!
UPDATE: The Roku Ultra seems to show 480 & 720 Tablo content nicely no matter which TV I connect it to.
So… here’s what I’ve learned:
(1) Tablo app has problems showing 480 & 720 content on some Roku devices.
(2) The problem does not seem to be related to how much memory is free on the Roku device.
(3) The problem does not occur on brand new Roku Ultra.
(4) Tablo says it’s Roku’s problem.
(5) Roku customer service is offering same old “reset display resolution”, reboot, rinse and repeat, “not a fix” fix . AND you’ll spend a painful 45 minutes in online chat with Roku only to realize you know more about the situation than the Roku csr does 😞
(6) Everyone say’s newer Roku devices don’t experience the issue BUT no one is providing any definitive details on which devices do or don’t have this issue with Tablo
So… now I’ve ordered a new Roku Streaming Stick 4K. We’ll see how well that works!!!
NOTE: my $99 Tablo cord-cutting adventure is now plus about $150 in new Roku devices.
