How to solve these situations:

1. No chests spawn until the final boss is downed. Then all chests appear in a horde of loot.
2. Players can vote to concede. A successful vote to concede returns all players to the start of the dungeon and spawns chests for bosses that were downed during the raid. The starting area is walled off.
3. When time limit expires, all players are immediately returned to beginning of instance (which is walled off) and all loot chests from downed bosses appear. Ample time is given to loot chests before the raid is booted from the instance.

PROBLEM SOLVED