If you stay in or near an icy Warped Forest for a long time, the Enderman will remove almost all of the Nylium. The whole Forest is getting ugly. There's nothing you can do about it other than change the rules for everyone.

Most of the Nylium will despawn or burn with the Enderman, when thay teleport near to lawa.

There are too many Enderman in the Warped Forest over time. Or they should pick up the Warped Nylium much less often.