With 2 players attacking the same Umbraglow Stinger for the "There's No Explanation For Fashion" quest, the NPC warps around between both players as threat changes between the two. This may be graphic or pathing related, I wasn't exactly sure. I didn't get to test the other "glowbug" NPC palette-swaps but it would stand to reason they also behave in this manner.
With 2 players attacking the same Umbraglow Stinger for the "There's No Explanation For Fashion" quest, the NPC warps around between both players as threat changes between the two. This may be graphic or pathing related, I wasn't exactly sure. I didn't get to test the other "glowbug" NPC palette-swaps but it would stand to reason they also behave in this manner.