Hey,
This is a patch update for the 2.4.x branch, fixing regions being removed by blocks with the same type as existing protection blocks, despite not being the actual region block.

While I do feel 2.4.x is now stable (though I said this about 2.4.0), you can still use 2.3.1 for the time being if you do not need the merging regions functionality.

Please continue to report issues you encounter, thank you!