Meanwhile the patch is being produced, I’ve found a way to mitigate the issue around wasted match (ranked play) due to lag with other iOS users also experiencing the issue.
- Download Hearthstone anew and dont download assets (that’ll prevent the game from crashing and would maybe transform crash into lag).
- Always wait for any animation to finish before touching the screen (that’ll prevent more intense lag from occurring).
- When lag occurs, double press the home button (to see all opened apps), wait 2-3 seconds when you see the opened apps (only Hearthstone should be opened), then click Hearthstone. That should force the app to remove exceeding data in the RAM and resume Hearthstone not to 100% free of lag, but often to an actually playable level.
Hope this helps