In a non precision approach MDA all authorities insist on +50ft. because when you execute a GA you are expected to loose that much and You are at Vapp at that point which is at least say 30 kts higher than alpha max. Then if you lost 100ft from alpha max is it surprising? this fly past was doomed even at 100ft because you will have no elevator left to effect flight path change. Some height loss had to be accepted.