@David-TP Thanks for your reply. To answer your question, the deco turns flashing red and drops out. Reproducing the issue at will is a bit difficult. Would that help you? Can I somehow download some...

I have 2 deco's in the house and one in the garden office, connected with a 20m ethernet cable to the main deco. If I don't use the office, the deco wifi in the office is fine (there's a heater in...