[OneBrainCell]

Describe the issue: Descriptors vanishing before they're due.

How to reproduce: Try and be a cool DM and have descriptors for your event, put them down in advance, and watch as they despawn before your players reach them. I put the first set for 16 hours and the second set for 8 hours. I tried setting them down for a third time as my players entered the map they were all on and they disappeared while they were solving the puzzle of the first descriptor. 

Please fix this, they're honestly so helpful and cool for DMs too but not if they're going to disappear before your players get there.