Roku devices don't update in the middle of streaming something, so that's not it. I don't really have a guess other than something else that's happening during that period that's affecting your Internet connection. Microwave ovens are known to affect 2.4GHz Wi-Fi connections, for example. Not that that's it, but something may be happening regularly at that time. It's a little odd that you're booted completely out of the channel/app. That usually occurs because of a crash in the channel/app's code.
Roku Community Streaming Expert
Help others find this answer and click "Accept as Solution."
If you appreciate my answer, maybe give me a Kudo.
I am not a Roku employee.