I don't think it has to do with the eluna event, I think they just nerfed the override box drop rate.
Yeah...I have noticed overall less box drops per DIPQ run
I've noticed changes with boxes.
Dipq stage 1 and 2 don't drop them anymore.
Arcane river monsters in chu chu aren't dropping them for me anymore. (level 111/112 kinesis I'm within one/two levels of the monsters)
Monster Collection Event
I have also noticed that the monster collection event punk monsters aren't spawning anymore for me too.
Ursus party que system isn't working but the party que option does.
Some skills for kinesis class aren't working in ursus.
Pychic Assult/Psychic Force is grayed out when entering the map even though it is chosen.
Pretty sure there is a lot more the update broke that we don't know about yet.
This was the response I got when I asked, they're not going to budge so rip the wings on reboot.
"I really do apologize for the confusion. As a fellow Reboot player, I totally understand where you're coming from. However, the reward is working as intended. On the other hand, I will let our game team know about your concern on our website to avoid confusion."