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Continue to ChatRoutes known issues confirmed in Pokémon GO where the Route currently being traversed will pause unexpectedly if a player switches between apps or locks device, this issue is resolved in release 277.2 and Niantic says to update Pokémon GO for the most up-to-date Routes experience https://pokemonblog.com/2023/07/23/routes-known-issues-confirmed-in-pokemon-go-where-the-route-currently-being-traversed-will-pause-unexpectedly-if-a-player-switches-between-apps-or-locks-device-this-issue-is-resolved-in-release-277-2/