Actually, the Update happens. However, there is an issue with the xml of v3.0.3; it still has 3.0.2 in the version tag (ie. <version>3.0.2</version>. Also, the date has not changed as it has the old date in the thecreateDate tag (ie. <creationDate>August 31, 2021</creationDate>).
If not the tag creationDate, at least the tag version must be corrected.
Note: If you look at the dates of the files within the T3 directories, you would notice the date on which the update has been done.