Thats the exact problem I was having. The capacitor only leaks under certain conditions, and by leak I don't mean leak the electrolytic fluid or bulge, but leak V through to GND when the temperature changes.
Yes I noticed the same thing occurring to me, over time the problem would get worse, presumably as the capacitor degraded further.
I would desolder the capacitor and replace with alike, I wouldn't mind betting that would fix your board.
I've informed GlobalScale how I fixed it, no response from them confirming the defective component, I don't expect them to confirm it either.