i send my dwellers out for 4 days and not a single one of them come back with anything nothing appears in there action log ether

I'm also experiencing this as well! I sent like 5 dwellers for a week and got nothing

Zu'u hind wah fun hi guys do dii diron voth Fallout Spaal. Mindin nii sav, nii crashes. ahrk fod Zu'u bo zek, Nii crashes fod nii sav ontzuk. daar pusojur lost wah kos fixed uv dovah um lein vis tinvaatey nii. In your toung it means I wish to tell you guys about my problems with Fallout Shelter. After it saves, it crashes. and when I come back, It crashes when it saves again. this bug has to be fixed or dragons around the world cant play it.

I noticed that in my "Vault Guide" the legendary dwellers are not showing. It says 0, when I've unlocked 4 of them. Everything fine with weapons and clothes