My top scavenger finally returned after days of scavenging with many found items. I used the new feature to sell off all of my common items at once before collecting the scavenger back into the vault. The scavenger's inventory showed all of my rare items still in his inventory as expected. After I collected the scavenger back into the vault, I checked my storage (plenty of space) only to find none of the rare items were collected! The rare items do not show up when trying to select clothing or weapons for a vault dweller either.

Fallout Shelter 1.3

Android 5.1.1

Samsung SM-G920A