This sounds like a bug that has already been addressed. You should ensure that you have the latest service release, or you could contact Developer Support to be notified when the appropriate fix is released.
-Matt
I have just installed V9.1 including the latest Hotfix available from the website
My application crashed due to this new (and unwanted behaviour).
After debugging I found the reason and afterwards this message from other users.
But, the bug is still there, even with the latest Hotfix !!!