The hard RAK831 cafe part 2

Hi I just deployed a RAK 831 Gateway in the AU915, the installation was straight forward however I’m encountering instability and I’m thinking this is maybe hardware related. I would like to know what the expected signal strength and SNR should be? At a distance of 4m (16 foot) I’m getting -55,25 when running at+signal.
I would have expected much better results given the distance between them. I have now tested with two nodes and the results a similar. All packets are received on SF12 at this distance I would expected SF7 or 8.
At one point I moved the end node directly next to the gateway and had some packets arriving at SF 8.

I some how starting to think that there is something not right with my radio, I tried a couple of different antennas, too. With the same result.

Dose anyone knows of a way to observe the packets coming into the radio of the *831 gateway?

I’m in 915 AU band.