I was just about to write about this too when I saw this thread. When I ask a companion to stay in camp, I automatically get their Alchemy Pouch, Camp Supply Pack, Keychain, as well as other items the game thinks are important. This is a major hindrance to swapping out characters as the controlled character likely gets encumbered. This has happened to me once before Patch 3 when Lae'zel temporarily left the party in Act 1 for story reason, but it had never happened in camp before the latest patch.
