I don't know where to post this otherwise so here goes. I made a ticket about this in-game as well but placed it under bug reports since I can't find an appropriate option. I'll copy & paste:

Not a technical issue, but I genuinely don't know where else to ask. I joined a party for Phoinix Savage today (P3S as people call it, the third boss of Pandaemonium) before clearing the first two again. It asked me if I was okay with forfeiting looting rights. To avoid being rude by leaving the party I accepted, thinking it'd only be for the third boss. Instead, it revoked my looting rights for the first two bosses. I humbly ask to have my looting rights restored for the first two bosses this week. If revoking them from the third boss is the result (we did not end up clearing the boss), then so be it, as that's what I thought I accepted, but I had no idea it'd revoke looting rights from the first two.

■Date & Time: 11/01/2022, 1:30 P.M. ST (Chaos datacenter), 2:30ish P.M. LT
■World name: Louisoix
■Character name: Lanaya Visili
■Monster name: Phoinix (Savage)
■In-game time: 1:30 P.M. ST (Chaos datacenter), 2:30 P.M. LT
■Platform: Windows
■Client Language: English

■Steps:
1. Joined a group through party finder for P3S
2. Had to revoke looting rights as I hadn't cleared P1S or P2S yet this week, accepted it not knowing it'd revoke looting rights for P1S and P2S rather than P3S
3. Locked from loot for P1S and P2S, rather than P3S as I thought I would be