Soldato
I had this on a place I moved into, in the end about 6 out of 10 spots had done it. Seemed they got hot and the plastic insulation had melted and exposed wiresFixed a flickering ceiling spot in my kitchen (12V).
The cable had freyed, and must have been shorting on the metalwork of the fitting. A bit of electrical tape appears to have solved it. Will need to check the other fittings for any signs now too.