Update: i've seen your modifications on Github, .. doesn't work or better say doesn't fully work: for an existing record, i can trigger the autofill only for the last instance of textarea.
Also, there is a problem with removing the groups and trying to add a new group (without submitting the form), the visual editor is toggled to plain text
Also, there is a problem with removing the groups and trying to add a new group (without submitting the form), the visual editor is toggled to plain text