After thoroughly cleaning and lubing the shield, I was able to put around 200 rounds through it last night without having the slide get stuck. There was one instance where it felt like the slide didnt slide smoothly, but it didn't get jammed. I won't be making this my CCW anytime soon, I need to get a lot more confidence in it.

Maybe this is a combination of a break-in issue as well as grease residue from the factory. I am planning on heading back to the range this weekend to put it through the paces again. Wish my luck!

Thanks everyone for the tips and suggestions.