1. Groups that are added to a global permission persist across uninstall then reinstall
2. Removed default groups (e.g. those added on install for global permissions with "defaultGrants": ["all"]) are not re-added if the app is upgraded / reinstalled over the top of an existing installation.
3. Removed default groups (e.g. those added on install for global permissions with "defaultGrants": ["all"]) are re-added after an uninstall then reinstall.

#3 was a change introduced in December 2023 to address ECO-63 (albeit not by diagnosing and addressing the root cause). This behaviour may surprise admins not expecting an uninstall followed by a reinstall to alter the state of their global permissions - the docs are abiguous on this point. On the other hand, if a long time passes between uninstallation and reinstallation, not re-granting default permissions is likely to cause surprise.