So this is a bit of an odd one, I've replaced all my bulbs with LEDs and all was good. But recently when I unlock it the lights come on and immediately go out rather than staying on and fading off after a delay. The wierd thing is every now and then it will do the courtesy thing when unlocking. It still comes on with the door opening, and does the courtesy function when I've driven it, removed the key and the lights do their delay into fade thing. Any ideas what might be going on?

Are they error free leds? As in there maybe a residual current thing going on which is causing issues?

They should all be canbus error free jobbies. I know the bayonet types all are the 501s might not be

And now seems to be working perfectly, could have been related to the sunroof drains leaking.