$ python repro2748.py
MongoDB version: 4.4.19
Find docs with a single query:
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19]
Find docs with the same query with skip+limit:
[0, 1, 1, 3, 3, 3, 3, 7, 7, 7, 7, 7, 7, 7, 7, 15, 15, 15, 15, 15]
Find docs with the aggregation with skip+limit:
[0, 1, 1, 3, 3, 3, 3, 7, 7, 7, 7, 7, 7, 7, 7, 15, 15, 15, 15, 15]

$ python repro2748.py
MongoDB version: 4.2.24
Find docs with a single query:
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19]
Find docs with the same query with skip+limit:
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19]
Find docs with the aggregation with skip+limit:
[0, 1, 1, 3, 3, 3, 3, 7, 7, 7, 7, 7, 7, 7, 7, 15, 15, 15, 15, 15]

from pymongo import MongoClient

client = MongoClient()
coll = client.test.test
version = client.server_info()['version']
print(f'MongoDB version: {version}')

coll.drop()
coll.insert_many([{"_id": i} for i in range(20)])

print('Find docs with a single query:')
print([doc["_id"] for doc in coll.find(sort={'missing': 1})])

print('Find docs with the same query with skip+limit:')
docs = []
for i in range(20):
    docs.append(coll.find_one(sort={'missing': 1}, skip=i))
print([doc["_id"] for doc in docs])

print('Find docs using aggregation with skip+limit:')
docs = []
for i in range(20):
    docs.append(list(coll.aggregate([{"$sort": {'missing': 1}}, {"$skip": i}, {"$limit": 1}]))[0])
print([doc["_id"] for doc in docs])