Critical - P2 It appears that when covered index can be used, but collation isn't involved in match or sort then the strings from covered index query are returned without being looked up.
db.stringtest.insertOne({ int: 1, text: "hello world" });
db.stringtest.createIndex({ int: -1, text: -1 }, { collation: { locale: "en", strength: 1 }});
db.stringtest.find({ int: 1 }, { _id: 0, int: 1, text: 1 })
// expected result { int: 1, text: "hello world" }
// actual result
{"int" : 1, "text" : "71??E\u0004UEK?/" }