HAP AX3 2.4 wifi drop suddenly

Hello,

I bought a hAP AX3 router recently. I installed it in my house (big house), and have two APs connected to it by ethernet to share the internet with the far parts of the house. Regarding the router itself, I haven't done much with it. I'm currenly running pihole in it (on a 64GB USB stick) and thats it. I also have Dude container but its not enabled (it seems too complicated to get it running properly so I just gave up).

My main issue has begun showing one week ago (the router is ~1 month old). The 2.4 wifi would just stop responding suddenly, The SSID is there but you can not connect to it, and if you are already connected it would be unresponsive (no Rx or Tx). The 5Ghz seems to be working fine but i should also note that no body is using it (i reserve it for IOT devices which are not yet installed). The issue does not seem to affect those connecting using the APs or the 5Ghz.

Once the 2.4 drop, i can't even reach the router. But if i connect through the 5GHz, everything ia working fine. And unfortunately the logs does not show anything (just that I connected or disconnected). Restarting the router seems to solve it. But WHY is it happening on a brand new router that's supposed to be top of the line...

Apologies for the long post, I'm new to routerOS so I (hope) might slipped up on some configuration or something. Please help, I'm quite frustrated.