It would appear this isn't just happening to the LGV20.
http://phandroid.com/2016/12/29/galaxy-s7-lens-breaking/
http://phandroid.com/2016/12/29/galaxy-s7-lens-breaking/
At least the repair would be easier on the V20. Just open the back and use a screw driver. Samsung? Forget about it.
There has been a few reports of the v20's camera glass breaking after being scratched. Actually saw it happen in some reviewer doing scratch tests. He scratched the glass with a pick not even leaving that much of a scratch, probably like normal slide your phone over a grain of sand deep, and about 2 seconds later he looked at it again and the glass was cracked. I can imagine that the same could happen to any camera glass. My guess is that the camera glass was cut at the upper end of the allowed variance and because of that it was a super tight fit causing extra stress on the glass. Stong enough for every day use but temperamental with scratches.My S7(work) has a cracked glass lens. Not sure how it happened to be honest, its in a case. Im sure(and had assumed) I had to have dropped it. With that said, I have dropped my V20 a bunch of times including hard surfaces with a slim case and no damage to the screen or camera lens.