same here. android user. i can get the reward when pops up but i complete the objectives without me noticing.
This just started happening to me out of nowhere at 99 dwellers. Everything else works and i have no clue what instigated the bug.
This is only for the one save, for now atleast. I can still access the objectives overview in my other save with only 9 dwellers.
I can apparently still progress with objectives but i have no clue if i can confirm the completion when one is done.
It would svck if that save became crippled and i lost my biggest vault which i spent money on getting Mr. Handys.
I really hope this just passes on its own or that it gets fixed fast.
Forgot to add im on Android with a Nexus5.
The fix has been found! However i cant post links for some reason so i will have to direct you to where you can find it.
Head over to reddit and find subreddit /foshelter and search " Found and Fixed the Crashing Objectives Bug " hopefully then you will find a post by "Gransom" with the exact title you just searched.
Simply follow the instructions and atleast for Android users the process should be simple Hope it works for you!
The link to the fix is available from in this thread:
http://www.gamesas.com/topic/1532994-objectives-crash-my-game/
[You might have an issue with pasting links to external sites - this link is to this site ]