Cannot resolve missing files when tagging stable releases from dev branch for module

In my dev branch of 7.x-1.x-dev of the Pushtape Features module, when downloading the dev release package all files exist. However, after tagging the dev branch for a stable release such as 7.x-1.3, the pushtape_core folder is empty which is not correct.

I followed the git procedure as outlined in the git instructions for my module:

git checkout 7.x-1.x
git tag 7.x-1.3
git push -u origin 7.x-1.3

I've attempted this three times 7.x-1.1, 7.x-1.2, 7.x-1.3 and the resulting package files generated by drupal.org have without exception, an empty pushtape_core folder. This is rendering my "stable" releases unstable and I can't delete these release nodes either which is potentially confusing. I'm not sure if this is because I did some major folder restructuring/renaming after my initial commit or what - but I'm stuck here.

Appreciate any help getting things back on track so I can properly tag stable releases from the dev branch.