P07 issue

Welp, went to the range today. P07 ran great for the first 2 or 3 mags. Then the problems started. The trigger wouldn't work in DA, just a straight up dead trigger. And in SA it works when it wants to. Have to pull it back repeatedly until it decides to fire. The goofy thing is that it works great when held upside down. Anyone else ever have this issue. I'm assuming it's a spring or something. Just figured I'd throw this up to see if anyone has any info on what to specifically look for before I start ripping it apart.