M6 PRO Wifi Signal Dropping Out

We have a M6 Pro Nighthawk modem which has been great & worked very well the past couple of years.  

The Nighthawk is connected directly to power with no battery fitted & has a couple of wifi cameras running off them at 2.4g.

However in the past week (since the latest firmware update 25/10) it now works for a couple of hours & then stops transmitting a wifi signal, like its gone into standby mode... Yes Wifi standby is switch to Never.  

We are located in Australia & the modem is recieving Telstra 5G signal on the dashboard, however not transmitting wifi to the devices connected.  There are 4 devices showing as connected to the Wifi.

When you click on the Data Usage section, normally this shows how much data has been used & how many days left on the plan. After a couple of hours once the Wifi transmission signal drops out, if you go back into the Data Usage section it no longer shows any data information - "Data usage info unavailable at this time" is the messaging on the screen.

Anyone had any problems with signal dropping out since the firmware update?? 

Please help... 👍