I'm using gh-pages to serve as a helm chart repo. At one point, it was working fine. Now, it doesn't. I package the chart, upload it, and update and push the index.yaml file in the gh-pages branch. I can go to the gh-pages url (effectively, the repo url) and examine the index.yaml file...I see the updated version listed there. I can copy the file url from index.yaml and the tgz downloads successfully. Looking inside the tgz, it has the correct version in Chart.yaml. All seems well.
But, when I run helm repo update [repo], none of the recent versions will show up. helm repo search shows only older versions. I've verified that the repo url is correct...it's the same one that I'm able to pull the valid index.yaml file from. I've also tried just upgrading a release using one of the newer 'missing' versions and it complains that it can't find the chart.
What am I forgetting?