Cartian Spell (Forbidden Book) extremely buggy when used in party.

The forbidden book scrolls are running into multiple errors while running them within a party. Some of the symptoms my group has noticed include: Endless monster spawn without boss, Unkillable bosses, Bosses that do not spawn, inability to leave party or invite others during any of these other symptoms, etc. Changing channels alleviates some of these issues, but not all of them. My group ran into all of the above today at varying points within 5 separate consecutive scrolls. I do not mind the lost scrolls, since they are accessible, but I am able to run these scrolls solo outside of a party, without a single one of these issues. I was able to run 36 of these in a row without issue, if I was alone, and not within a party. I have not tested this when I am the only person in a party, which is achievable by having another member leave while you remain. When a party member is stuck in a party, and is unable to invite, a message appears as following, "[you may not leave while the leader is summoning]" and "[You cannot invite others while using a scroll.]"