Hive Some Pkugs and Valves stopped working

I have Hive heating along with the radiator valves and plugs. All work fine however yesterday when I woke up I noticed the hive plugs and radiator valves were off line in one room, the conservatory. The Wifi in there is excellent and the alexa device is working. All other plugs and radiator valves around the house work. I haven’t changed anything to make this happen and now at a loss.