Sorry for not responding. Where can I get the 1.2.1 version? On the official TP-Link website it says that I can't downgrade past the 1.3.x.

So I tried pinging it and it basically is ~3ms, but every 8 seconds, the ping is 3000+ or Request timed out. Still the same after factory reset.

Two days ago, I updated the router to the newest firmware. Since then (didn't change anything in settings) I've got 2 problems: My 5GHz Wifi is dropping every 10 seconds for a second or two. The...