Android 10 - Samsung A6 (A device that surprisingly plays Hearthstone decent, including battlegrounds)
After reinstalling during the earlier days Hearthstone boots to the Sign-In / Play the Tutorial menu.
Clicking Log in from each of these three methods:
From this screen
Clicking Log In Here in the top right corner of the tutorial
or during the tutorial → Options → Log In
all result in the phone freezing.
Edit: After opening this thread:
I downloaded the Amazon App store on my device. It automatically located Hearthstone where I only had to press Update. After about a minute install it resulted in the same state. However, removing Hearthstone and installing it clean from the Amazon Appstore worked for me.