I recently switched to this router and I am having ping spikes when on wi-fi. I tried testing with a phone app and also my brother that is connected to the WiFi has ping spikes when playing games. My computer is connected directly with an Ethernet cable to the router and I am not having any issues. Didn't experience any ping spikes on old router. Already turned off OneMesh which helped a little bit but the ping spikes are still there.

Edit: I was testing again and found out this is an issues only on the 2.4ghz band. On the 5ghz I had just tiny ping spikes compared to the 2.4ghz band

Edit2: Nevermind the ping lags are there even on the 5ghz but they are a lot less common then on the 2.4ghz

Edit3: Changed the channel on the 2.4ghz band to 3 and on the 5ghz one to 48. It seems that the ping spikes are completely gone on the 5ghz band (did around 500 pings and had no spikes)  but on the 2.4ghz channel it seems that it did not help at all, maybe it even got worse actually.
Edit4: Found out the ping spikes happen even on my computer that is connected with LAN. But they are not really noticeable, the ping goes usually from 1 to 15 which is pretty okay but it is bothering me a bit.

Edit5: So I have reverted the firmware to the one the router came with ( 1.0.9 Build 20210322 rel. 73262(4555) ) and the ping spikes on my computer (connected on lan) and my 5GHz band seem to be completely gone now. I am guessing the 2.4GHz ping spikes are related to firmware so I don't know what else I could currently try doing.