Indirect parametrization with scope="function" does not always work

Indirect parametrization with scope="function" (or not specifying scope) does not seem to work when the following two conditions match:

1. The previous test's request param scope is larger than function
2. The current test's parametrized request value is identical to the previous test's

• Code to reproduce

import pytest


@pytest.fixture(scope="module")
def fixture(request):
    print(f"fixture (scope={request.scope})")


@pytest.mark.parametrize("fixture", ["a", "b"], scope="module", indirect=True)
def test1(fixture):
    ...


@pytest.mark.parametrize("fixture", ["b", "c"], scope="function", indirect=True)
def test2(fixture):
    ...


@pytest.mark.parametrize("fixture", ["c", "d"], scope="function", indirect=True)
def test3(fixture):
    ...

• Result

$ pytest -s -v
======================================================= test session starts ========================================================
platform darwin -- Python 3.9.18, pytest-7.4.3, pluggy-1.3.0 -- /Users/yugo/.pyenv/versions/3.9.18/envs/test_3.9.18/bin/python3.9
cachedir: .pytest_cache
rootdir: /Users/yugo/Desktop/test
collected 6 items                                                                                                                  

test_something.py::test1[a] fixture (scope=module)
PASSED
test_something.py::test1[b] fixture (scope=module)
PASSED
test_something.py::test2[b] PASSED
test_something.py::test2[c] fixture (scope=function)
PASSED
test_something.py::test3[c] fixture (scope=function)
PASSED
test_something.py::test3[d] fixture (scope=function)
PASSED

Note that scope="function" is not working in the test test_something.py::test2[b] that matches the above condition.

• System environment

$ pip list
Package        Version
-------------- -------
exceptiongroup 1.1.3
iniconfig      2.0.0
packaging      23.2
pip            23.0.1
pluggy         1.3.0
pytest         7.4.3
setuptools     58.1.0
tomli          2.0.1

$ sw_vers
ProductName:	Mac OS X
ProductVersion:	10.15.7
BuildVersion:	19H1217

Start by running the reproducer in test_something.py with pytest -s -v and compare fixture behavior for test1, test2, and test3. Trace pytest's fixture and parametrization handling for repeated values across module and function scopes. Done means test2[b] receives function-scoped behavior and a regression test covers the reported sequence.