NPCs not being spawned when quickly moving in and out of the range

[derrop]

Description of the bug:

In Minecraft, players are not being spawned when they are not in the tablist. When a player moves in, directly out and again into the range where NPCs will be spawned, they will not be spawned because they are not added to the tablist.

Expected behavior:

Before addinf the players twice to the tablist and removing them too early, they should not be added twice and the timer for removal should be restarted.

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[derklaro]

I think this is an issue of juliarn/NPC-Lib, not cloudnet (moved it to that repository)