Yes, indeed, I have ! (Many yrs exp.) It's in the hands of a technician as I write. I don't think it's repairable. It seems to be a burr that allowed it to be assembled but is preventing it to be disassembled.
Brand new gun, just fired 50 rounds. The breakdown lever WILL NOT depress clockwise to the vertical position. it stops hard at the 5 o'clock position. Will not go any further. Any advice