●○○○ — Not much; I'm just letting you know about it.
Steps causing the bug to occur:
Edit a Share Value node title to have lots of space in it to make it a long header on the canvas.
Save, close and reopen composition.
As a side note (haha) if you undo after changing 20 shared value node titles as I just did to get a screen grab of what I'm talking about it removes all the changes in a single undo and there is no redo available on this. Ouch!
Example images of "Notes" made from Share Value nodes (before saving and losing):