Hi, issue is in title.
Locking items prevents from moving, fading, etc, but we can still split them.
An additional option is needed to block any interaction with locked items, so that they are really fully locked. Only unlocking should be possible.
It is not a new bug, I have tested older versions and it seems to behave the same.
You can find the discussion thread here :
http://forum.cockos.com/showthread.php?p=1506080