I've noticed myself have this same problem in the past. I doubt there's a single tell-all solution, but I'll tell you what I did and you can work from there.
I also was skipping heel side and would catch my front edge every once in awhile. I made two small changes that made all the difference in the world. First, I adjusted my highbacks forward just a tad. Not much at all, just enough for me to be forced to bend my knees a little more. By bending your knees, you have better shock absorption for when these bumps happen. The second relates to the first, bend your knees more.
What worked for me is consciously thinking about my knee bend the first 2-3 runs of the day. The whole way down I would remind myself to flow in and out of my turns. To keep my legs at a point where I could recover if I bounced on a transition.
The changes not only helped me catch edges less, but also made me more confident. Just my .02, but It may help. Good luck!
If you want to be a chick, a dude, a tent, or a velociraptor be my guest, but if you choose the last one you bet your ass I will have a spaz-12 to your face.