CPU spikes and heavy lag in HS Battlegrounds

I am experiencing significant performance issues while playing Hearthstone on PC, specifically in Battlegrounds mode.

Starting from Turn 6 (Time Warp turn), the game begins to suffer from heavy slowdowns and stuttering, making gameplay uncomfortable. During these slowdowns, CPU usage rises to around 70%.

My PC configuration is as follows:

  • NVIDIA GeForce RTX 5070 Ti
  • Intel Core Ultra 7 265KF
  • 32 GB DDR5 RAM

To rule out hardware-related issues, I tested other, more demanding games such as Call of Duty: Warzone, and I do not experience any performance problems in those games.

I have already tried the following troubleshooting steps:

  • Complete uninstallation of Hearthstone and Battle.net
  • Deletion of all cache files
  • Fresh reinstallation of the game

Unfortunately, none of these actions improved the situation.

This issue started occurring a few days ago, which makes me suspect a recent update or change affecting Battlegrounds performance.

Thank you in advance for your assistance.

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