Missing python-version 3.9.5?

Randomly, our test runner (Unbuntu 20.04 / Python 3.9.5) stopped working: Make separate messages for t-042 typos · standardebooks/tools@7d2b86a · GitHub . As far as I can tell, no code changes at our end triggered this. It’s easy enough to fix by updating to python-version 3.9.6, but, as far as I was concerned, versioned artifacts wouldn’t just disappear.

Has anyone else run into this? Is this expected behaviour? Or was there a chemspill-type incident with 3.9.5 that required the artifact to be removed?