E.g. Append multiple sheets into one sheet and plot data from it. If modify data in source sheet and recalculate, plot will be gone.
This is because before Origin 2019b, recalculation recreated the output sheet.
The issue exists in tools that are used to join data in different sheets, e.g. wjoinbycol and wjoinbylabel.
Note: these two tools can be accessed from script window only.