I just finished the recommended solution at https://community.netgear.com/t5/General-WiFi-Routers-Non/R6300-Wireless-Speed-Drops-Requires-Hard-R.... This is the functional equivalent of the old joke where the computer engineer in a stalled car recommends getting out the car, running around it, getting back in to get it started. That thread was last active in 2016. Might there be a more recent solution to the problem?
I did a speed check from the IOS Nighthawk application immediately after doing the factory reset and firmware installation. Have a look at the attached file. You'll get a kick out ot it.
