Pokémon GO is in the process of being updated to version 0.77.1 for Android and 1.47.1 for iOS devices. Below are some release notes and comments from the Pokémon GO development team at Niantic:
- A confirmation dialogue now appears when attempting to transfer costumed Pokémon.
- Costumed Pokémon can no longer be mass-transferred.
- Resolved a bug causing occasional network errors while battling in Gyms.
- Resolved a bug causing Raid Battle lobbies to display the incorrect number of Trainers preparing for battle.
- Resolved a bug causing the Pokémon selected in the Raid Battle lobby to be reset after clicking the items button.
- Resolved a bug where some Curveballs weren’t registering properly.
- Various bug fixes and performance updates.
Source: Official Pokémon GO blog
Pokémon Blog 
One thought on “New Pokémon GO update adds confirmation dialogue, alters costumed Pokémon option, resolves bugs and more”