NPC having a level up particle effects when loading into areas sometimes

[Crona Darkdance]

Not sure how old the bug is, but when you enter a dungeon per f8 the NPC in the Portal Area sometimes get the white level up wings and particle effects when you load in. Also have seen it when you enter the current Giganura event with the Plog at the Entrance. Unsure what causes it, but it happens quite a bit.