This really, really sounds like a problem with the barrel link. With that few rounds, you may not see deformation yet. If it continues, I'd definitely send it to SA for a warranty claim with good details on what's happening.
Also: Double-check your ammo. Any chance it's overpowered and bulging the brass, making it hard to extract?
good....too much speculation as to the problem/issue.It locked up after one shot today. I'll call Springfield in the morning.
Okie John