- 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