Expected Behavior

advancements save whenever i save & quit and reopen the server

Actual Behavior

advancements are cleared whenever i reopen the server

Steps to Reproduce

save & quit after feeding animania animals to receive advancements
close the game, reopen it
load in and check advancements, all advancements are gone.

Version of Minecraft, version of Animania, Single Player or Server

running 1.12.2 minecraft on forge version 1.1.2.2-forge-14.23.5.2855

animania-1.12.2-base-2.0.3.28
singleplayer, but usually ran with LAN enabled using Radmin VPN (im the host)

i'm unsure what is causing this, as all my other mods and normal advancements will save, but animania's doesnt.