RBR20 satellite acting up after firmware upgrade to 2.5.1.16

What is the Mfr and model# of the Internet Service Providers modem/ONT the NG router is connected too?
Is the Orbi system operating in Router or AP mode?

I use my own cable modem "NETGEAR Cable Modem CM500" and Orbi is connected via a LAN cable.

Orbi operating in Router mode

What is the size of your home? Sq Ft?
What is the distance between the router and satellite(s)?

1100 sqft, they are in good distance, Orbi system was working fine for over a year until the firmware update

What channels are you using?

Auto currently, i can try setting it to 1, 6 or 11 but not sure if this will help

Any Wifi Neighbors near by? If so, how many?

I believe around 7-8

Try enabling Beamforming and MIMO

Both are enabled since when i set up Orbi system

Try disabling the following and see: Armor, Circle, Daisy Chain, Fast Roaming, IPv6

All these are already disabled

Set 20/40Mhz Coexistence to 40Mhz only

Already the current state

Set Short preamble instead of Long preamble modes

Currently set to Auto, i can try setting to Short

Has a factory reset

If all above fail, i may have to do this and update to the firmware before 2.5.1.16