AXE6600 ET8 6Ghz issue

[Cdamania10]

Hello All, I am facing a weird issue. I have 4 Asus ET8 setup as a route and yhe rest nodes. Back haul via ethernet connected to a gig switch. It use to work perfectly where all the bands were showing. 2Ghz, 5Ghz and 6Ghz and I had my phone connected to the 6Ghz and showing 6E and if I would move around the house it would transfer the phone to different nodes. Recently I started noticing that even though the wifi 6Ghz is enabled only the ET8 that assets as the main router works with 6Ghz the nodes don't work for 6Ghz it will not display it but setting shows that it's enabled and on.  When I go close to the main router ET8 it connects to 6Ghz instantly. Not sure what is happening and my suspension is something was messed up.after a firmware update came thru. Any assistance would be appreciated. I did a factory reset and still the same. 

[Cdamania10]

So after looking at the network analyzer I noticed that tye nodes 6ghz comes on and goes off. Not sure what would cause this. For 2.5Ghz i see all 4 brocasting, for 5Ghz I see 2 nodes brocasting and for 6Ghz I only see 1. Not sure why it's not displaying all of them for all 4 nodes. 

[jzchen]

One more thing the nodes are Mesh nodes correct?  Not set up as Access Points?  (As Mesh nodes I'd expect all routers to broadcast the same 6 GHz channel and bandwidth)...

[kaho0505]

Same problem of me too. Only main router can connect to 6GHz, all of the secondary can't connect to 6GHz. All ET8 are v1 version. Backhaul via ethernet with cat6e cable connected. Can anyone help? Already updated to the latest firmware 3.0.0.4.388_25112

[jzchen]

@kaho0505 @Cdamania10 I'm concerned when you note 5 GHz also missing from nodes.  There's a setting for 6 GHz called Preferred Scanning Channels (PSC).  It is a good idea to enable that if not already enabled.  I believe it is a check box, but I also believe TP-Link sets that as a default.

@Cdamania10 I would swap the worst one with your main router and see if they swap performance.

[Cdamania10]

So I tested the 5ghz on all nodes and it's working perfectly. I did check and looks like the box is checked for the 6ghz.  So I did do the swap this morning and the issue still stayed. Main primary router dishes out 6ghz no issue but the nodes nothing.  I noticed that one other person also mentioned the same issue as me. Not sure if this is related to a bad firmware that is causing this.