When match expression optimization is disabled on whole cluster by adding the code:
 

FixtureHelpers.runCommandOnEachPrimary({ db:db.getSiblingDB("admin"), cmdObj: {configureFailPoint:"disableMatchExpressionOptimization", mode:"alwaysOn"} });

A failure is seen in the following line where returned document at oplog seems to be 1 but expected is 2.

https://github.com/mongodb/mongo/blob/92738c5fa0e8169299e5393e88159b8cbb9559ca/jstests/change_streams/oplog_rewrite/change_stream_match_pushdown_documentKey_rewrite.js#L149