Hi !
Thank you for investigating this issue.
The issue is still reproducible with last iOS version (13.2.3), latest game version available for this OS version (15.6.36453) according to AppStore on my iPhone SE MLM72F/A A1723.
I checked what was uploaded on my iCloud and there’s nothing related to hearthstone in it. Only 937 ko are used but for other apps installed on my iPhone.
To be sure iCloud was not used by Hearthstone, I disabled hearthstone access to iCloud in iPhone settings > Apple account (first line of settings menu, above airplane mode) > iCloud > unchecked hearthstone line.
After this, hearthstone still crashes when I try to start a conversation with someone.
I have a friend running the game on an iPad, same game version, iPadOS version 13.2.2, and the crash does not occur on his device (iPad pro 12,9 inches 3rd generation, MTFL2FD/A A1876).
iCloud synchronisation for hearthstone is activated and nothing is stored in it.
I experience the crash for a while now, and this is indeed a bit annoying to talk with people inside the game ^^’
Hope those little tests helped !
Asfal