yep this happens to my LEDs too. here's the explanation...
the MINI is fitted with a tiny self checking current thingy which courses round the car every couple of minutes, checking that all the sensors remain untampered with, and because leds work on so much less of a voltage than normal bulbs, this tiny current is enough to light them. I bet if you watch them for long enough, they will flick on and off every couple of minutes
To start with this annoyed me a lot, but tbh, I prefer the colour of the LEDs so much more, that I put up with the flickering.
Hope this answers any questions
