Thats exactly how mine started . . . now it doesn't go on at all first go (left side). I have noticed if I drive for a few k's then try again it works. This tends to suggest something is loose. So far, like IML337 they can't locate the cause hence a need to get as many people with the problem in Aus together so we can get MINI Aus to have a serious look at the issue.
I'll PM you with what we need.
Regards
Brad