Its happened to me.
Flying along, level in a slow banking turn.
I wasn't stressing the airframe at all and was, in fact, powered down in an attempt to lenghthen my duration when all of a sudden: "you have crashed" message popped up and I was in the tower.
I believe this is a feature that is coded in. If not then its a bug of some sort. I posted on this elsewhere but haven't heard anything definitive from the HTC staff. Until I get an answer I don't feel comfortable flying the Me163.
So I concur, this is an issue that is worthy of further exploration.
David