I recently bought an AXE75 2.4/5/6 GHz tri-band router. I'm trying to use it as 6 GHz network with iPad Pro 2022 11 inch. But the 6 GHz network is almost impossible to be used. I connect to it, use it and then all of a sudden it completely disappears and I'm connected to 5 GHz network. The problem is I cannot see it as available even if the dashboards and the LED indicating it is switched on. If I restart the router it will usually reappear again, but for how long it's a wild guess. I tried lowering the channel width to 80 MHz, PSC channels only or not, Auto channel selection and manual one, nothing really helps. I can achieve maximum few hours of availability of the network and then it's gone again. It feels deeply frustrating to buy this router for its 6 GHz ability and not being able to use it... And being new to the TP Link routers I'm really wondering - since this is a new technology, is it normal that the last firmware update was done a complete year ago? 
 

Hope someone can provide insight into this and thanks in advance.