I just released v1.2.4 which should fix some of the bugs reported above. Changelog:
- Fixed infinite block duplication by disabling avalanches when EnviroMine mod is loaded.
- Fixed small mobs choking inside sloping blocks.
- Updated to Forge 10.13.4.1541.
This is also the first version of Repose to be open-sourced on GitHub, so you can see how it works internally: https://github.com/delvr/Repose