After the latest update I have some problem collecting dwellers coming back from the wastelands. Basically I click on the dwellers lined up outside and the game HUD disappears, but no dweller sheet comes up. The game is going on, but I cannot do anything, like pan or select any other dweller. The first time this problem occurred to me I closed the game entirely and then the problem was solved, but this second time the issue is not solved this way... I even tried to reboot the phone, with no luck.
Anyone else is experiencing something similar? And what would you try to solve the problem?