And yesterday I played r6s (multiplayer game) on my laptop and had significant WLAN drops. Then I later identified the Bluetooth headphones that were also connected and zack, the WLAN is working again. And this is not an isolated case.
What could I do about it? I would be reluctant to set the whole router to 5 GHz.
It is best to use an Ethernet LAN cable. WLAN is occasionally affected by interference
but to answer the question. It is theoretically possible that Bluetooth interferes with the WLAN signal. It can also be walls, other devices that cause electromagnetic waves or fields or poorly shielded cables that cause interference.
Bluetooth transmits at 2.4 GHz. WLAN and Bluetooth can get in the way. Only one thing helps: 5 GHz for the WLAN or Bluetooth. Or stop cables instead of Wi-Fi.
If you really want to deal with it, you need basic physical knowledge in the field of radio.
In general I can only tell you:
Provided that only your laptop and your Bluetooth headphones are active at the location in the ISM bands, then either your headphones, your laptop or your WLAN access point does not work in accordance with the rules.
(May well be the case with cheap China direct imports.)
The other variant would be that the ISM tapes at your location are simply overloaded.
A combination of both is also possible.
