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I’m getting an error that’s logged when running async flows locally with prefect that complains:
```Exception ignored in: &lt;async_generator object add_event_loop_shutdown_callback.&lt;locals&gt;.on_shutdown at 0x7f3d81b374c0&gt;
Traceback (most recent call last):
  File "/home/jon/miniconda3/envs/abraxas-env/lib/python3.10/site-packages/prefect/utilities/asyncutils.py", line 308, in on_shutdown
AttributeError: 'NoneType' object has no attribute 'pop'```
Which seems related to <https://github.com/PrefectHQ/prefect/issues/7709|this issue> (which I’ve already commented on). I have no idea how to solve this. It seems like some odd threading/multiprocessing bug where <https://github.com/PrefectHQ/prefect/blob/693694ac8a5c457cd3d45030f086114ecaf5e910/src/prefect/utilities/asyncutils.py#L39|EVENT_LOOP_GC_REFS> is not being copied over correctly somehow.

I created a PR that seems to fix this bug: <https://github.com/PrefectHQ/prefect/pull/9748>