TPlink use Trend Micro's database for content filtering/categorisation. If your issue is as simple as the kids website being mis classified, you can go to Trend's website and request a manual review...

@MikkelDK Were you able to confirm that it was the relaying process that is the culprit by the method I suggested? Until you’ve eliminated other variables it could still be something wrong with the...

@MikkelDK Ok, to be clear here: As you suspected, the speed test in the Deco app runs from the Master Deco , not from the Phone. This implies that the slowdown is occurring in the relay process...

@TalTik Just to make it clear - as has been stated in this thread a few times, the Deco system supports WPA2 (AES) and always has. The issue is that you cannot turn off the support for WPA (TKIP)....

@TP-Link_Deco A very useful way to address this would be to provide a way to have a default filtering category for new devices (before another is assigned). This would enable a secure by default, and...

@Jannek999 From the website photos there are 2 Ethernet ports on the M9, like the M5. In which case you probably have the MAC address from the other one. Swap the cable over and see if that works....