Decreasing performance

Whenever I play Hearthstone on my mobile device (Samsung Galaxy S7), at first everything is totally fine. But the longer I play, the more the game starts to lag. After 30 min to 45 min it’s really hard to drag a card to a target. And after an hour it’s totally impossible to play. When I close and reopen the App, the timer is “reset”. Has been like this for about 6 months now. Thanks for your help.

I encountered that issue on heroic Thekan. Had to close Hearthstone app then launch it again to resume and play lag free again.

Although this issue also occurs on some games in the ladder.

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