HACS doesn’t have forks.
HACS loader is a custom integration that helps you install and keep up to date other custom Integrations.
I believe just about any custom integration can be monitored by HACS, but the software is the authors and lives in GitHub.
That said I would also check on GitHub at the repo you are using, they may have an idea but generally if you have tried multiple custom integrations showing an issue, there is a problem locally.
What local Zigbee style you running? (ZHA, Z2M, other?)