Somehow the electric connection had fallen out of the bracket. Had to disassemble and reassemble some bits but really, maybe 3 months of mild irritation and in the end it took maybe 20 minutes to fix. There’s a lesson I don’t want to learn somewhere in there…
I’m in an older (1970s?) Canadian apartment where the motto is “death before replacements or upgrades.” I do see it reasonably often in older buildings, not so often in modern ones.