So, I had a guy out for two days and he had about 53 items on him, some rares, etc. I finally got him back today and when I hit collect, I only got about 25 of them. I had 80 Inventory and only 8 taken up. It appears that all of the "rare" items disappeared.

I'm going to test this again, but I think its a pretty dang annoying bug.

Note: I did not click the "coin" button before I "collected" his items.

I had the same thing happen, had collected 70+ items, storage cap is 90 with only 3 items in it. Missing approx. 25 items. VERY discouraging!

Same here, ive had this bug happend a few times already. My Explorer went out for 4 days 4 hours to get the maximum 100 items and when he came back, i only collected less than 60 of the items. I have more than enough Storage to collect all the items. Its really very disappointing and discouraging.