supple jetty
Steps: Seal Orologion, start game with Arcanas enabled, switch to Darkanas, select X - Hail from the future, level up a few times, game will crash eventually.
Unsealing orologion will resolve the issue.
I believe it attempts to drop one of the sealed items and causes the crash.
This was performed on the Switch, but I believe this would be reproducable anywhere. I did also happen to be playing coop, but I don't think it would matter either. Characters were ex-dash and Leda on Coppa Magna with all checks enabled without random events or levels.
winter fulcrum