I have an Rt-ax58u; when I was used to firmware Version 3.0.0.4.384.10177 and Version 3.0.0.4.384.9918, the 2.4G shows Tx Rate and Rx Rate 6.5Mbps a few min. And then it came back 65 or 74. When it shows 6.5Mbps, I can't open any web pages.
I have tried 386.1 beta 3 and it has same problem...