I cannot reproduce the issue you mention after script reload (in Cinemachine 2.8.9 or 2.9.2).
You mention in the bug report that the bug is:
Reproducible with: Cinemachine 2.7.9 (2021.1.0b12), 2.8.0-pre.1 (2021.2.0a19), and
Not reproducible with: Cinemachine 2.8.0-pre.1 (2021.2.0a20), 2.8.6 (2021.3.10f1), 2.8.9 (2022.1.17f1), 2.9.0-pre.6 (2022.2.0b8, 2023.1.0a11)
Cinemachine 2.7 is not supported anymore, so if you are using that, please update your Cinemachine to the latest 2.8 or 2.9 versions.