@Gelo_G What's your main router make and model ? Check you main router 2.4GHz wireless channel and make sure that it uses wireless channel 1, 6 or 11.

@MasterPiece572 Your FW region is most probably (US). This should be printed on the device bottom sticker. For your current FW version Archer AX23(US)_V1.20_1.1.0 Build 20230725 there's a note that:...

@MasterPiece572 Which FW region your router is - that's on its bottom sticker as well as its HW version. Which version of the FW you're trying to downgrade to ?

@Gelo_G Update manually the RE to its latest FW release TL-WA855RE(EU)_V5_1.0.13 Build 231115 - here and then test again.

@MasterPiece572 You should usde this guide (Case 2). That's the way you should do that.

@Sapienz You don't have to re-install the router last FW again. Just re-configure the router and use this guide for configuring parental controls - then test. If that still doesn't work for you refer...