isinstance return different result with sys.setprofile

[lonsdale8734]

python: 3.8.5

import sys
from typing import TypeVar


def run():
    sys.modules.pop("typing_extensions", None)
    from typing_extensions import ParamSpec
    return isinstance(ParamSpec("P"), TypeVar)


def trace_call(frame, event, arg):
   return trace_call


if __name__ == "__main__":
    print(run()) # True

    sys.setprofile(trace_call)
    print(run()) # False??

    sys.setprofile(None)
    print(run()) #  True

[srittau]

FWIW, I can reproduce this with Python 3.8.18 and 3.9.18, but not with 3.10.13 and 3.11.6, where the typing version of ParamSpec is re-exported.