To add more context to this - Because this is the only on of my plugins where this issue exists:
I think the “release-count - 1” (0.0.5 instead of 0.0.6) could have to do with the fact that I deleted a release because I messed up the name (“0.0.03”) in the very beginning.
This would explain why it says “7 releases” but there are only 6 actual releases.
So, manifest.json on master dictates what will be offered to install. That was the problem. I’ve bumped the version there and it’s working as expected again.