Replying to Salomon bindings

Has anyone else had an issue with salomon bindings ejecting at the wrong times when landing switch?  I had the Z12's last year and some days it was like playing Russian roulette when I would try to land.  I can't count the number of times that I would have landed a 5 but one ski fell off as soon as I touched down.  Now this year I had the STH 12's.  The problem was a littile better but the issue was still there.  Now I am looking at an ACL reconstruction surgery because I twisted my knee on the way to the ground after loosing a ski on a landing that I would have easily ridden away from had the ski not fallen off.  I guess I am just wondering if I am the only one having this issue or if this is common.