This is regarding the Roku TV app on android devices. I live in the boonies where there's no hardline internet. My phone hotspot IS my internet connection. The cast icon doesn't show up in the Roku TV app. I KNOW this is because wifi must be turned off on the phone in order to run the hotspot. Other streaming apps detect this as a valid wifi/internet connection & turn on the cast icon, and work pretty much flawlessly.
So I tried installing the Roku app directly on the TV and my Chromecast, both ways are extremely glitchy, stop playing & says can't display video after every commercial break. If you try resuming episode, it'll display the same error. You have to restart the episode from the beginning & FF to where it glitched & sometimes it gets into a mode where even restarting an episode from the beginning errors out.
I can find no way to relay this to Roku development/support, anybody have an actual email address or phone #? The casting from an android device that's a hotspot seems like an easy fix, other streaming channels support it.