kahrpm9,
There are No problems that are Not Human caused.
The reason for the slide sticking, is due to improper Re-installation of the recoil spring after one has field stripped it, as to take it apart to clean it etc....
Instead of putting the recoil spring in straight or inline with the barrell, someone has inserted the recoil spring offset, therefore causing the slide to stick.
I have had mine for quite a few years, and it has NEVER failed me or let me down one singal time.
If the xd is what you like, and it fits you, get it. Otherwise, keep looking, but I am sure you will be Very happy with it.
As always, Stay Safe.