Re: Has anyone had this happen to them when unplugging?
"Hercules"-branded rubber plugs [that was the Woolworths home-brand version of Duraplug] were prone to this - the rubber cover had a brass insert moulded-in to take the cover retaining-screw: over time the rubber shrunk [often leading to the plug-pins relaxedly adopting a formation that made them tricky to fit a 13A socket without wiggling] and after a while the bond between the insert and the cover failed so the cover would pull-off rather than pulling the plug out.
This is the sort of issue that has educated me not to unnecessarily or wantonly remove any kind of plugs from their sockets - and in plenty of cases to replace 13A switched-sockets with unswitched fused flex-outlets!
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