AX88u - Weird 5ghz problems with MBP

[Sptz]

Hi all,

So I have an AX88U, flashed with the latest Merlin. And I had it positioned essentially in the corner of my house. Which sometimes caused issues with my connection from my home office. Mainly with my M3 MBP.

So I decided to move it closer, with longer cat cables. Substantially closer in fact. You can check the image below of my flats layout.

Blue = Old Router Location
Green = New Router Location
Red = Macbook Pro location

What's REALLY bizarre about this is that before, connected to 5Ghz, I could get around 200-400Mbps on the MBP. Now, with it closer, I'm getting 40-60Mbps. My iPhone, on the exact same location gets around 250Mbps.

Any idea what could be causing this? How it actually got worse?

 

[Tech9]

Look at the signal levels to this client first. This wall it is sitting behind may be creating Wi-Fi dead spot.

 

[bbunge]

Bath rooms also have pipes in the walls that could cause issues and maybe the walls have insulation that could cause issues...

 

[Tech9]

A wall on a diagonal as shown on the OP site map is like signal reflector. The router moved closer and right behind another wall may actually create larger dead spot in this area. Hard to tell without a heat map. I have a similar situation in one part of the house with the signal goin through locker with a wall on one side. Not critical in my case, no clients there. The signal drop is from -52/54dBm (green area) to -65/70dBm (yellow area).