For Firestorm users:
firestorm_change_log_4.6.7.42398 [Phoenix Firestorm Project - Wiki
FIXED “Restore to last position” for no copy objects has been removed
Due to the risk of content loss when using the RESTORE TO LAST POSITION feature on certain no copy objects, this has been blocked.
For those wishing, at your own risk, to re-enable restore to last position for use on no copy objects, you can do so by setting AllowNoCopyRezRestoreToWorld to TRUE in debug settings