auto_paging_iter returns duplicated items

[barreeeiroo]

Describe the bug

This is a strange bug, as it happens randomly. I do have to run the same test multiple times, and it happens maybe on 40%-60% of the instances.

The issue I'm facing is that auto_paging_iter is iterating, and consequently returning, the same item twice.
I'm trying to call search_prices API, and I do have 15 prices to be returned. I'm filtering active=true and some metadata fields. Then, I do the following:

    prices: List[Price] = []
    res = client.prices.search(params={"query": query_str})
    print(res)
    for price in res.auto_paging_iter():
        print(f"Real adding {price.id}")
        prices.append(price)

In the first response, I see price_1SH9GKCjrU80UaAVjS6Nm5aL being returned as the last entry. Then, in the logs, I see this:

Real adding ...
Real adding price_1SH9GKCjrU80UaAVjS6Nm5aL
Real adding price_1SH9GKCjrU80UaAVjS6Nm5aL
Real adding ...

Could it be possible that the auto paging iterator is not properly respecting the next_page key, and is "repeatedly returning" the same item twice?

To Reproduce

1. Call Prices Search API with auto_paging_iterator, with active=true and some metadata fields.
2. Make sure there are over 10 prices matching, to force pagination.
3. Log the unique IDs. At position 10 (default page size), it may sometimes be duplicated.

Expected behavior

auto_paging_iter should not iterate over duplicated prices

Code snippets

See above

OS

Linux

Language version

Python 3.13

Library version

stripe 12.3.0

API version

2025-03-31.basil

Additional context

No response

[barreeeiroo]

I can share a recording of the test with more details via some private channel, given it would disclose more IDs than just Prices unfortunately. But yes, I can just keep re-running it, and it randomly returns repeated results on paging iteration (basically the last item of page 1 is also included in first item of page 2). Not sure if this is a bug in the Python SDK or in the API itself though...

[barreeeiroo]

The issue is in the API actually, not in the Python client, I was able to replicate this using the Shell from the Workbench:

And it happens randomly actually: