This version updates to how destroyed blocks regenerates
When using this plugin on server version 1.14.x, there is an issue where blocks destroyed by TnTs would drop the block's items, making the availability to duplicate items an option as the block would still regenerate. This could have been due to an update on TnTs in Minecraft v1.14 where TNT explosions would now have a 100% drop rate. This issue is now fixed in this plugin update. This should in theory if there are other plugins that works with TnTs should also work with it.
Configure which blocks should not be able to regenerate by adding the block material name under "blocks" in the config.yml file. You can also configure the drop chance by setting the chance value between 0 - 100.
This method is setup so if I were to introduce new options for the blocks, it would all go under here. Currently however to prevent issues, to choose which blocks shouldn't be regenerated, you'll need to add these under "blocks" for example to ignore diamond blocks & stone from regenerating: