@SquidPunky Hi! The current workaround for this issue is rebooting the game (you will not lose access to the chest, it will be in the same location it used to be). That being said, the team is aware of it persisting for some users and they're investigating. Thanks for being patient!
@Lisa_Baynes Hi, Lisa! Unfortunately, due to platform restrictions, PlayStation doesn't support cross-platform play. Therefore, it won't be possible to synchronize your progress from other platforms/consoles with your PlayStation account progress.