Please read v. 1.3.1.3
The update 1.3.0.9 contains some important refactoring. While there are currently no reported/found issues, we do not recommend using it on live servers yet. If you really need this update, you're good to go, but if you're fine on your current version wait until the change log does not contain this text to let more tests pass.
1.3.1.3
ADDED
- Option to convert vanilla hoppers on placement:
# Should normal hoppers (not from this plugin) be converted on placement?
convert: false