Do you run any home servers? Home assistant, FTP, Security Cameras, and so on.
Also you could ssh into the router enter top command and see what's using up the memory.
@Saltgrass I do remember high memory use prior to switching from 126.96.36.199.388_22237. But I have two HDDs connected, one via USB and another via ethernet. I also have my Android phone connected as a Dual WAN failover mode. I don't remember it being this high before though, but it doesn't feel like performance is lagging so I am at peace.
I have been researching how to use ssh and will try it as soon as I figure out how. Thank you for the suggestion!
I can say the 188.8.131.52.102_3506 beta firmware is a lot more stable it seems with regards to AiMesh. Does anyone know if my running it helps ASUS tech somehow? Anyways I had to turn off and on the RT-AX86U to get it back online once, but that is mild compared to before. I did try to connect an iPhone as a Dual WAN backup, but I did not check if it showed as connected. I may try again soon, as I specifically swapped my Android for my mother's iPhone so I could tether the Android phone to the router. One new feature of the beta is being able to use an iPhone as a WAN device....