Ah, blaming bad power for ASUS router webui issues. Maybe merge with the AX11000 thread so I can enter my FedEx tracking number which had the new unit which … fixed it.
I have had this issue from day 1 with the Asus rt-ac86u but most of time its fine so never bothered, sometimes my internet would go flaky with websites not loading or showing time out messages trying to click on my Asus rt-ac86u normal webui page and no page found or timed out message. (I run latest Merlin (dirty flash mostly!) with openvpn and Ai protection/gaming and anything else switched off 56% ram usage usually all runs well)
Even unplugging the router and waiting few minutes in-between and still no webui access, I had to do the hard reset with WPS button and reload from scratch doing the triple jff format+factory restore+merlin firmware flash, rebooting after that and re-setting up from scratch. Done it 3 times last 2 weeks.
My broadband company has its fair share of issues lately with 2 engineer call outs to repair/improve their street hubs so not sure if it was my Asus or their Modem or broadband service, but I have installed the scMerlin and putty so next time it happens Ill try option 3 to reboot the webui and if that don't work reboot the openvpn client or entire router even.