I feel like this has a some with mobility. If your hips or hamstrings are extra tight then it's more difficult to maintain a properly arched back and get the knees back at the same time. It still may happen to but it shouldn't be common among developed lifters. Also, it may have some to do with leg and torso length.
I use to have this problem when I first started lifting and it was really just a matter of getting my knees back out of the way. You can do some Snatch/Clean DLs to try to isolate that part of the movement and dial in on how you're bringing the bar off of the floor.