Constant small dropouts on brand new Orbi AX4200 Mesh Wifi 6 (2 satellites)

Hi everyone

I have recently purchased a new Orbi wifi 6 package with 2 satellites.

My primary purpose for this is to ghet my remote office working well in a new house. I replaced an older version of the Orbis that only had one satellite as it couldnt reach my office well enough 

I am experiencing constant small drop outs (most between 5-10 seconds in duration with the occasional 20 second one).

I have a fast connection operating at a consistent 90-97% of plan speeds (NBN 75/20 connection)

My ISP has been tracing the connection for a few days. I have been doing the same thing. I am able to see dropouts all the time, my ISP is not. Response from my ISP:

"Our ping plotter shows no dropouts over the coarse of a 48 hour period. In this case I would suggest looking into the hardware a bit further, Try replacing ethernet cables were possible and look into resetting the Wi-Fi hardware, If you need a hand with this let us know!"

My view: 

Reply from 192.193.0.107: bytes=32 time=31ms TTL=238

Reply from 192.193.0.107: bytes=32 time=54ms TTL=238

Reply from 192.193.0.107: bytes=32 time=41ms TTL=238

Reply from 192.193.0.107: bytes=32 time=52ms TTL=238

Reply from 192.193.0.107: bytes=32 time=56ms TTL=238

Request timed out.

Reply from 192.193.0.107: bytes=32 time=34ms TTL=238

Reply from 192.193.0.107: bytes=32 time=37ms TTL=238

Reply from 192.193.0.107: bytes=32 time=46ms TTL=238

Reply from 192.193.0.107: bytes=32 time=41ms TTL=238

Above is pretty much constant... every 5-20 mins i get a drop out 

I have tried to wire the remote PC (30metre cord through the house!) and it stops the drop outs which narrows this whole thing down to these orbi satellites. 

I have tried to wire intro the nearest satellite and its the same issues, for obvious reasons. 

I am looking at returning these and getting my money back but hoping someone here has a solution because I don't have any other ideas other than the 30 meter cord which my wife doesn't love!

Thanks in advance