Noticed that the boss chest in dzonot cave is not respawning. I opened the chest and took its contents then went elsewhere for a few days (5-6) without going back there. When I went back the trap at the beginning was reset and the lesser chests were full again. But the boss chest in the back of the 2nd level was empty. I've got OOO installed and that is my only mod. Do boss chests not respawn, just not the one in dzonot cave, or do I need to wait even longer? Sorry if this has been asked before, my search didn't turn up the answer.
I just looked at that chest in the CS and it is set to respawn. Did you go to a city and wait? If so, OOO is likely the culprit. Try asking in the http://www.gamesas.com/index.php?/topic/1119240-relz-oscuros-oblivion-overhaul-133/