A hot start question

Hi peoples.. Hopefully this is an easy one for you experts out
there...

Hot start on a fuel injected Lycoming commonly seems to call for
leaving the mixture at ICO and cranking. Bearing in mind the engine
stopped because the mixture was set to ICO, and if you're then not
moving the mixture before cranking, how does the engine then fire??
What's in there for it to fire??? Shouldn't the same lack of fuel
that caused it to stop also prevent it from starting again??

Are we saying the injection system leaks after the engine is shut
down?? And is that dribbling from the injectors what causes
flooding??

Cheers

Chris