Followed all the steps above and managed to successfully perform the flash operation, reset the routers and did a brand new setup.
The issue is that I am still getting satellite drop off every about 1 hour or so, been running continuous ping tests from 2 laptops, one connected on the router and one on the satellite to establish what is the culprit and have constant single packet losses ever about 25-30s and full signal loss.
Checked the backhaul connection between the router and the satellite and it was Good.
Tried some of the steps that used to help on stock firmware disabled the 20/40 coexistence, moved the 2ghz to channel 6 or 11, 5 ghz to 48, disabled daisy chain, tried with both Mu mimo and improved wifi options for mobile turned off and on and all combinations and simply have an issue where the satellite connectivity fully drops off.
Tried setting the router into AP mode to see if there is any improvement.
Any help would be greatly appreciated.
EDIT: Even in AP mode the connection to the satellite dropped as well. Having serious thoughts of scrapping the whole system and moving to something more stable.