[Pixelmon]Pokeballs falling through world


I have had a problem recently on my pixelmon server running griefprevention, luckperms, nuclear, and world edit. Recently after setting up griefprevention when I launch out a pokemon everyonce in a while I won’t be able to retrieve the pokemon and it makes duplicates, or that is really annoying is that the pokeballs start falling continuously through the world. I do not know how to fix it as I have tried everything I can think of.