Yeah, it's weird (and very disappointing). The OD model I bought with plans to turn into my ultimate carry gun. At this point it's had a LWG trigger job, Boresight Solutions competition grip package, and RMR milling... I've got close to $2k into it and there's not a chance I would trust it as a carry gun. 51 stoppages in 11,210 rounds fired, or 219 MRBS. Almost every single one of those was shooting strong hand only, but not limp-wristing the gun. The problems started before the grip work, so I don't believe that the texturing weakened the frame at all (Ben indicated VP9s have very thin frames and a hack stippling job can compromise them more easily than other manufacturers).
Meanwhile, of my four other VP9s, one has gone 5,499 rounds with zero stoppages, one is at 1,084 MRBS (6,505 fired with 6 stoppages), one is at 582 MRBS (21,536 fired with 37 stoppages, but half of those were Freedom Munitions or shooter-induced, so...), and one is at 2,861 with zero stoppages.
Breaking down the data further, of the two trouble-free guns, one is stock (other than sights), and the other has a GrayGuns trigger job. For the three guns that have experienced failures, one is stock (other than sights), one has GG trigger work, and one has LWG work—I cannot attribute any of the reliability deficiencies to aftermarket mods.
Note that I've fired 1,022 rounds of quality defensive ammunition (mix of P9HST2 and RA9B 147gr) through all five guns with zero stoppages. Total combined round count as of this writing is approximately 47,461.
The VP9 is a good gun, but it's not perfect, and practice ammo is cheap for a reason.