I believe I have the same thing happening to me. When pushing down it stops before going all the way in then when I push a little harder it makes a click or snap into place. I just recently bought the car and dipstick is reading really high. I'm going to change out the oil and see if the correct amount was in or not.one thing i just noticed - I've never put 6liters of oil in this pan during oil changes. typically 5.6qt gets me to the top line of the dipstick. I've also got a strange issue that might be exclusive to me- when i press the dipstick all the way in, it "twangs" against the tray on top of the oil pan, which results in an inaccurate reading. I have tried bending it slightly but that has never helped. I either reverse the direction for oil reads, or I let it "twang" and then take the reading the next day.
And, it pains me that they put imperial fasteners on a car composed of metric ones.