According to the publication “Albania’s Past and Present” by Constantin A. Chekrezi fromm 1919, after the French left Albania, the Greeks immediately invaded Albania in 1920. 21 of those invaded villages in Korça were given back to Albania, but the Greeks instead receieved Lake Presba, also inhabited by Albanians.

Source

Chekrezi, Constantine Anastasi. Albania Past and Present. New York: The Macmillan Company, 1919.