New - NetGear Orbi Firmware Version 2.3.0.32 now available...

This is my 2nd replacement unit as the first setup the wall satellite decided to brick itself when an automatic firmware installation happened around 5 months ago. So have had the replacement around 4 months all seemed to work ok at first. Noticed the drop in WiFi around a month ago but put it down to a bug in the firmware, so have waited for a new release to see if the problem would rectify itself.
Both units are on the latest available firmware from the orbi site, The rbr40 is in the hallway in ap mode as the current providers router is set in bridge mode with an ethernet connection between the two. The wall satellite (rbw30) is set up around 10 meters from the rbr40 in another room plugged in around a metre from the ground. Using WiFi anyalzer app on Android phone when standing directly above rbr40 the signal strength shows 60dBm walk a metre away from the rbr40 and the signal drops to 80dBm. For all other signals whether it's the wall satellite 5ghz or 2.4 or 2.4ghz on the rbr40 the signal strength is hitting 40dBm or higher and the same for the backhaul channel on the rbr40 that shows 30dBm when on top of router. Have changed channels, played around with various settings, transmitter power, fast roaming etc. But the problem still exists that's what makes me think it could be a hardware problem, potentially a faulty 5ghz radio transmitter?? The 5ghz network still works within the house but all devices are connecting to the wall satellite and refuse to connect to the 5ghz router as the signal is too weak. Looks like I may have to return the item back to Amazon or put up with the defect??