My c425 keeps showing as offline despite having a signal strength of-48 RSSI.

i have 2 other Tapo cameras connected to the same TP Link Mesh Network, they are connected to a dedicated IOT Network and connected in 2.4ghz. 
My network is a TP link deco mesh system which is connected to a Starlink network which generally operated at 200meg down and about 20 up.

None of the other cameras connected to the network are affected. (Another C425 and a C520WS.

Please help

rgds Simon