@mikerusselltw 

Hi,

I don't have a TP-Link tri-band router myself to test this, but maybe you could try the following if you'd like and then report back the result.

- completely remove the RE705X from the OneMesh network ("Leave OneMesh" on the AX90 and factory-reset on the RE705X)
- switch off the 5GHz-1 wireless radio (Advanced -> Wireless -> Wireless Settings)
- add the RE705X to the OneMesh network again
- verify that the 5 GHz wireless link is working at the expected speed of around 2400 Mbps
- switch on the 5GHz-1 wireless radio
- check whether the 5 GHz wireless link is still working at the expected speed or not

- if still okay, then reboot the AX90 and the RE705X to see if it sticks or not

  @mikerusselltw I am having the same issue with the AX90 and RE815X, which personally I think is absurd. Why sell a tri-band router and a tri-band extender (totaling $500 investment) if they don't support OneMesh backhaul for the 5G-2 band?

Defeats the purpose of having the third band and destroys what would otherwise be a unified and seamless experience.

The engineering team is telling me that EasyMesh would solve this, but no timeline for Easymesh on the AX90.

Anyway we can push TP-Link to expedite these releases?