Pitch-bend ruler broken?

This is on version 11.11.42
The pitch bend ruler in matrix view seems heavily broken. Placing a 
point at position in time it gets placed in randomly different places, 
deleting points is not awlays possible and doing it erratically deletes 
notes, as well as screwing up the undo sistem (i.e. you delete pitch 
bend points, it deletes notes and you cannot undo it, so you have lost 
those notes).

Not thet the pitch bend ruler has ever been the most usable tool. But at 
least it used to work in a strange but predictable manner.

Any hint?

Lorenzo.

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