@Ziron Thank you for taking the time to answer. "A large amount of devices (older/cheaper especially) only support channel 42..." Nice to know I got older/cheaper device. Maybe time for upgrade. And...

Looking around on this forum: A lot of issues would be solved if people can manually select channel. So, why hasn't this been implemented in the last 4 years? It seems the automatic feature selects...

All 5GHz devices in my neighborhood (8 so far) all use channel 42, including my Deco M4 (EU ver). so yes...got a bit of interference sometimes. Network optimization done and app says it has changed...