Niantic confirms new Pokémon GO issue where entering into a Team GO Rocket Boss Battle with Giovanni causes the app to freeze after updating to app version 331.0, this issue will be fixed in update version 331.1

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Entering into a Team GO Rocket Boss Battle causes app to freeze

Last Updated: 1h

Issue Description: After updating to app version 331.0, entering into a Team GO Rocket Boss Battle with Giovanni causes the app to freeze.
Issue Status: Fixed in future release (331.1)

Source: Official Pokémon GO site

Source: Pokemon