I am using Creo Parametric Release 9.0 and Datecode9.0.7.0
We are using symbols in notes/tables with "&sym(...)" syntax. In some cases we reuse the same line in a note by copy paste function (using ctrl+c, ctrl+v).
We noticed that doing so we get sometimes additional symbol, which is not visible, but placed behind note (not visible and not embedded in the note). Moreover, when symbol is being deleted from the note there is artifact of a deleted symbol remaining behind the note (not visible and not embedded in the note anymore). Those "background artifacts" causes issues when trying to update any symbol overlapping with artifacts.