@Tripledrop 

Hello,

Do you mean all three Deco M5s are flashing red LEDs when the internet disconnects? At that time, are the wireless devices still connected to the TP-Link wifi but no internet access or they lost connection totally? 

Is the network topology like this: Vodafone router-switch-3 Deco M5s are connected to the switch or network by an Ethernet cable? If this is the case, try to switch all three Deco M5s into Access Point mode to give it a go.

Best regards. 

@Tripledrop 

Hi, glad to hear that it works, congrats.^_^

If need any further help, just let us know.

Good day

@TalCh 

Hello, thanks for reporting.

I remember you have reported a speed issue when using the Deco devices months ago, and it was concluded that the speed or signal was cut down by the thick walls in your house. As per this dropout issue now, I assume it may be still related to the distance and the wall barriers.

If this is the case, I'm afraid we cannot provide more suggestions but try to relocate the Deco units and try to find a location with better signal coverage to build up the stable connection.