Hello. My plugin completely ignores their plugins, allowing them to control damage on their own. However, their plugins do not support server.pve true because their NPCs have IsNpc = false, meaning the server treats them as regular players. As a result, damage to them is mirrored when the server is in PvE mode.
You either need to set server.pve false(this will remove your PvE tag) in the console(plus, you need to disable "forcibly implementing PvE" in the config file: SERVER\oxide\config\RealPVE.json) or find the IsNpc property in their plugin and set it to true(I don't know why they set it to false, there are probably some reasons for it, do this at your own risk).