Mine does it to, mostly when it gets hot which is strange. There is a little door sensor pin that moves back and forth and that needs lubricated. Unforunately I haven't fixed this problem yet cause it hasn't happened recently but have read up on it. The pin is somewhere inside the door which requires removing the door panel. Here's a link where it was asked before.
They say to use WD-40 but I'm not so sure. It works in the short term but in the long term gets gummy and makes the problem worse. Use graphite dust, works great for metal on metal and won't gum up.