Groove power fluctuations

New groove R52HpN “out the box” Saturday.. Plugged up to 21dB mesh, readying for install. (2.4g)

-75/-76 from loooong distance AP (used for testing).. This morning checked it out before I install it later.

Signal changed to -75/-87… (this appears to be a drop in output power) as reported by the distant AP.

Disconnected power to unit, reconnected supply.. Logged back in, and there it was, whilst I was watching the registration page, it changed from -76 to -87 infront of my eyes.

Chose not to reboot or recycle. So, disabled/enabled interface and back it comes, 15 minutes now at -77.

Using Ros5.24

Is there now a problem with the plastic grooves on 2.4g as well as the metal ones???