Not normal. Go to dealership. Get fixed.
I'm always surprised that when weird stuff happens mechanically, people live with it and go to the boards for advice. If I saw my shifter do that ONCE, I'd be at the dealership immediately to get it addressed. Letting stuff like that go on can make matters worse.
2011 1 Series M Coupe VO M3 vs 1M Comparo Review
2011 M3 E90 DCT ZCP (sold) * 2010 335i Sedan (sold)
2005 M3 Convertible (sold) * 2003 325i Sedan (sold)