YA ..Mines been doing the same thing . Its like there is a burr on it .
Just grab the end and twist it around untill you find a spot where you can push it in .
mabey smear some grease on it .
I think its coming out too far and getting hung up on the inside of the hole .
Probably needs to be taken apart and deburred .
( noooo deburr fo whan hundred eighty dahlah )