Anybody else had a 2000µF capacitor in a beauty case explode

I replaced one for a friend a couple of years ago and last night one went pop in my own beauty case - lots of smoke. Another is bulging a bit at the top.

I'm using homemade modules - nothing too fancy, just a passive ring mod with a tl072 buffer, and a 90˚ phase shifter with 3 x tl074 and a tl072, both of which which I have been using for ages.

I would have thought one of the regulators or diodes would have popped first if there was a problem with the current.

Anybody else had a similar experience

Sean