[rem1313]

What channels do you use on wifi? If you you use DFS channels on 5GHz it could be a radar issue that forces your router to switch channels. I have it as well, but it happens at night so I'm not terribly concerned about it (my router sends me notification thats how I know).

Edit: https://en.wikipedia.org/wiki/Dynamic_frequency_selection

[qwertox]

The devices are staying connected, so I doubt that this could be the source of the problem.