Issues with the fix-curing-zombie-villager-discount-exploit

Me and my friends have a server this server uses PaperMC. we have fix-curing-zombie-villager-discount-exploit set to false. that is what we want. the issue is that after a few minutes the fix-curing-zombie-villager-discount-exploit works again so we cant trade 1 paper for 1 emerald. but when we go to the configuration it still says that its on false. what can i do to stop it from reseting