When a global catalog item is re-added to a content source, the policy enforcement only happens for a few projects and so the items only displays in the catalog for a subset of the projects instead of all the projects for which the item is entitled.
To workaround the issue:
1. Create a dummy Cloud template in each project.
2. Release it to catalog for each project.
3. Create a content source for each project.
The correct content should now all be visible