Taking only the name of the round (Educational Codeforces Round 71 (rated for Div. 2) ) into account, one can suppose that the round is rated only for Div.2 participants, meeting unexpected rating drop in a while.
Educational Round misguides you
Taking only the name of the round (Educational Codeforces Round 71 (rated for Div. 2) ) into account, one can suppose that the round is rated only for Div.2 participants, meeting unexpected rating drop in a while.