I hope the author hasn't abandoned the plugin.
I found a bug where the area expands when blocks are placed, and the plugin doesn't work in pre-installed worlds or those generated using seed.

hello the plugin is cool but you can't specify where the border should go. I would like to be able to change the location of the border using coordinates. Thanks :)

A great plugin, it's a pity that the borders are not updated in the lower world and in the end

great plugin............................................................................