[paperback]

Linux Mint 20.1 / Cinnamon 4.8.6 / Calibre 5.38

Try this:

1. Open the "Insert special characters" window.
2. Click on "Greek and Coptic", for example, and scroll halfway down the list of Greek letters.
3. Now click on "Greek extended", for example, then click back on "Greek and Coptic".

EXPECTED RESULT: The scroll bars should be in the same position.
ACTUAL RESULT: Scroll bars have been reset to top of range.

IME, it is more convenient if scroll bar positions are retained from last use, at least for the period that the "Insert special characters" window is open. (For example, when working with Greek characters where you need to change frequently between "Greek and Coptic" and "Greek extended")

N.B. If you close the dialog, when reopened, it does remember the position of the scroll bars. So there seems to be no reason not to do the same when changing from heading to heading in the same session.