Android
- Resource bars do not decrease, resources can be gained and will be added but the bars will never decrease. This happens when you try to do the glitch time going forward your phone time settings and back again. There is no fix at the moment.[verification needed]
- The first tutorial that has you building the power plant. After that it tells you to select a dweller to assign to the power plant and the dweller cannot be selected. [verification needed]
- 3rd Expansion of rooms not joining together - when the player deletes a room to create space for a room expansion, room expansion won't register and a single room will be built.[verification needed]
- All dwellers have blacked out faces.[verification needed]
- Sent out an explorer for less than an hour, he now has 20 items, and is going to take several thousand hours to return.[verification needed]
- During raider attack if the game crashes, upon reloading the vault is still in "under attack" mode but there is nothing to attack, raiders are already gone. Resources no longer produce, nothing progresses. The room that was being raided still has dwellers with HP bars ready to fight, but nothing to fight. All other rooms look like they are operating normally but do not produce any resources.[verification needed]
- When in loading screen after choosing vault number, the game will crash and sends back to phone home screen.[verification needed]
- Occasionally when sending dwellers exploring, they will be able to explore forever without any events or without gathering anything.[verification needed]
- Constant crashes when opening objectives screen. Game restart does not fix the problem.[verified]
- Game crashes on "Please stand by" screen if the cellphone shut down while playing previously.[verified]
- The only known fix currently is to completely reinstall Fallout Shelter, as the crash destroys any existing saves.
- When assigning Vault Dwellers to a new room or when two couples go to have a baby at the same time (overlapping themselves), occasionally they will become invisible and unable to be selected. To fix this close down the app completely.[verification needed]
- Radroaches become invincible killing all Vault Dwellers in active room, Suggested fix is to move Vault Dwellers to a new room and wait for rad roaches to move into new room. Closing the application and rebooting phone does not fix this bug[verification needed]
- If your phone's batteries run out after opening a lunchbox and unlocking the cards, the cards will disappear once your game has restarted.[verification needed]
- When exploring the wastes, sometimes your dwellers will report finding caches or refrigerators, but when they open them, no bonus item is granted.[verification needed]
- Undraggable Pregnant - When attempting to move a newly pregnant dweller back to her job she sometimes becomes selectable but undraggable. It seems only a restart fixes this.[verified]
- In a radroach incidents, sometimes the workers will animate as running around uselessly or continuing their work task instead of assisting with exterminating the radroaches if they are unarmed.[verification needed]
- XP earned while your vault dwellers are exploring the wastes doesn't seem to increase their level.[verification needed]
- Stimpaks can not be applied to dwellers.[verification needed]
- Invisible Corpse - When reviving dwellers there's a chance that an invisible corpse will remain and upset anyone working there. The only known ways to fix this so far is to delete the room and rebuild it or have some other dweller die in the same room and deal with the corpse.[verification needed]
- Attacked / dead dwellers - it seems that there is a bug during raider attacks when dwellers from other rooms taking damage although raiders are not there.[v