Hi I was trying to field strip my XD9 service model after taking it to the range and I went through all the steps of locking slide turnin slide release up to 12 o clock position. Releasing slide lock then pulling trigger.... But the slide feels caught on something it took ten tries and it just slid off that one time and once again it seems stuck, am I doin something wrong have these guns been known to get caught on anything internally ?? I'm not sure what to do.