I'm not familiar with a Glock 34 doing that. We've run many 10's of thousands of rounds through 17's with factory sights without that problem. Some of our older range guns have 200,000+ rounds and I haven't see that yet.
Haven't seen it on high mileage 10mm, 357Sig, 40, 45 either, yet I guess anything can happen.
Did see someone launch the whole top section of a Kimber off the receiver next to me 4 years ago at the DPS range north of Austin. That was interesting....