Switching language results in "new version available"

I play Hearthstone on an Android tablet. The system language is german. I have installed Hearthstone, started the game, waited for the complete download in the main menu. After that, I switched ingame the language to english. The game reloads and gets stuck in the startup scene and shows a message that there is a new version which I have to download. Tapping on the message sends me to the play store but the app is the latest version. And now I’m in a loop and cannot play anymore.