Stock Asus firmware isn't required or needed for stable AiMesh performance. All the networks I set up are using RMerlin firmware on all main/primary routers and on any/all AiMesh nodes that are needed on those networks.
Don't speak of things you don't know of. Your negative attitude towards RMerlin firmware and Asus hardware is exhausting.
Regarding AiMesh there is no difference in AsusWRT or Asuswrt-Merlin.
Ok, I have to agree with you...
Even after a factory reset (via the web interface) the version you linked didn't take either.Your router has ancient firmware full of known security issues.
Maybe you shall start with reverting to factory default, then manual update to 3.0.0.4.385.20252
Download is here:
If that succeeded, try a further upgrade to 3.0.0.4.386.51255.
After the final update you shall NOT load an old configuration file, the router shall be manual configured.
Do you have an Asus branded router or the T-Mobile (TM-AC1900) branded router?Even after a factory reset (via the web interface) the version you linked didn't take either.
T-Mobile branded.Do you have an Asus branded router or the T-Mobile (TM-AC1900) branded router?
Edit to add: If you have an Asus branded RT-AC68U, as a troubleshooting step you could try using the Asus Firmware Restoration Tool to flash the latest firmware.
[Wireless Router] How to use Rescue Mode (Firmware Restoration)?
Welcome To SNBForums
SNBForums is a community for anyone who wants to learn about or discuss the latest in wireless routers, network storage and the ins and outs of building and maintaining a small network.
If you'd like to post a question, simply register and have at it!
While you're at it, please check out SmallNetBuilder for product reviews and our famous Router Charts, Ranker and plenty more!