If you're running Custom Jumppads on a 1.13+ server it is strongly advised that you update to this version.
1.13 Fix | A while back some major fixes were implemented to address an issue where the trajectory-assisting entity wasn't removed and was only removable by using world edit. This could also result in the removal of water blocks and other non-solid blocks. This fix was only implemented for player launches but it has come to my attention that other entities such as animals and monsters were affected. This version fixes this issue!