db.test.drop();
for (let i = 0; i < 10; ++i) {
    db.test.insertOne({a: 1, b: 1});
} db.test.createIndex({a: 1}); db.test.createIndex({b: 1});  // Observe 0 in skipAmount
print(db.test.find({a: 1, b: 1}).sort({_id: 1}).limit(5).skip(5).explain().queryPlanner.winningPlan);

// Same query with hint (so without multiplanning) will show correct amount
print(db.test.find({a: 1, b: 1}).sort({_id: 1}).limit(5).skip(5).hint({_id: 1}).explain().queryPlanner.winningPlan);