@Clive_A Thank you for your reply, but I found out what the problem was! Beside the fact that I adopted the router to the OC200 by resetting it to factory settings, I also added it to Home Assistant...

@Clive_A Thank you for your reply. I was wondering why this has only happened after the adoption of the router? It started on the exact same day when I factory reset my router. Before that day, I had...

@KimcheeGUN No I have not, since this happens at 02:00 in the night.

Since a month or so I've been running an Omada network which has been fine. Had some problems with the adoption of my router ER706w in the controller OC200, but after a factory reset of the router, I...

@MR.S Thank you for your reply. This was already set-up in the controller and the ER706w adopted these settings immediately. So the WiFi was good from the get-go.

@MR.S Haha yes, that's true. Update: I performed a factory reset and after the reset, the ER706w was eligible for adoption! It's connected and working like a charm now ;). Thank you very much.