@xtremerox After the reboot it works again, 2.4 ghz now says channel auto: (current channel 7). So when it stops working it current channel is unavailable. Perhaps the bug is related to this.

@Kevin_Z Hi Kevin, I think you are mistaken, I didnt mention anything about the WAN/acces point. I have connected my internet to the WAN port in normal router mode. The plot thickens, now my 2.4 ghz...

@Kevin_Z Wired and 2.4ghz work fine. On 5ghz it happens on several devices, ax68u wifi sata card, surface pro, samsung tablet, OnePlus phone etc. They all have the same issue, the 5ghz is visible...

@Kevin_Z The 5ghz stopped working properly again. Exactly same sympthons, it is possible to find the 5g network in clients. when connecting to it, the connection fails. 2.4 ghz works. I am now trying...

@Kevin_Z I have installed the latest drivers on my clients. I could adjust the channel width but that will slow down my 5ghz devices... I don't want that. If it happends again I will manually choose...

I bought the AX6000 archer today and found the 5ghz ac channel stops working properly after an hour or so. a reboot fixes it. It stops working on both my windows 10 with asus ac68u wifi card as well...