Thank you for reporting the issue. The underlying issue here is that code in newer Unity versions modifies some properties of the component that are hidden by the inspector. Because properties are overridden, the entire component gets the override marker but, because the overridden properties are not visible, it looks like nothing has been overridden. Unfortunately, resolving this issue is difficult and risky. We have reviewed the issue carefully, and in this case the team is unable to prioritize fixing this bug.
Thank you again for taking the time to report this issue, and please let us know if there is anything else that changes the impact or severity of this issue.