I typically try to join a party beacon, but since I had it bite me when the leader went straight onto a new game before I could collect all of my drops i have been reluctant to join them again.
If I don't join a party I am guaranteed to be able to collect my share if the drops.
This this this. I honestly am surprised after all these years on JP this isn't something that was ever addressed. I want to join parties for the extra triboost, but there's no point in having triboost if I'm going to lose all my loot! I keep having rude leaders do this and it's absolutely ridiculous to me that they have a dialog pop up to the party asking if they're ready to go, if the leader can force it. I mean sure, let the leader force it but if they do, it shouldn't pull you unless you consent.