This started happening around 2-3 weeks ago as my wifi randomly cuts out for about 1-2 seconds then comes back

Hi I have an Archer AX55 V.1.6 Router, I received an automatic Firmware update request through my router settings online website app and like an idiot i thought Hey ! what a great idea "A NEW FIRMWARE

I recently upgraded with my fiber ISP from 500Mb to 1Gig service, but am only achieving 550-650 wired WAN speeds on my AX55. I performed a factory reset, firmware upgrade, and removed the Tether app.

We have all tried to access the router directly to no avail. HTTPS access has also been disabled. All the suggested solutions do not work. Some may have worked in the past but updates to firmware have

I want to limit the bandwidth the extender connects with....only 2.4. How do I do this?

Router is Tp-link AC1900 Went to router, click on "AP Isolation" Rebooted router Double checked to make sure "AP isolation" was clicked, it was. Tried to install network wired printer on wired desktop