Springfield Factory Trigger Job: Click Instead of Bang. Too Much Lube?

I recently sent my Springfield XD-M to the factory for a “Combat” trigger conversion. This afternoon, I brought the modified gun to the American Firearms School for a work out. The XD’s trigger was as crisp as a freshly-laundered shirt. But there was lots of clicks where there should have been bangs. I shot four types of ammo: Remington UMC, Hornady Critical Defense, Independence and Blazer. I switched magazines. Nope. I called Springfield Armory. After cautioning me for dry-firing (which I did a handful of times), Jacob reckons the gun may have come out of the factory with too much lubrication, which might have gunked-up the striker channel. Or something. I’m taking the XD-M to my gunsmith for a closer look.