I too had stability issues when I first wanted to get into HA. I’ve tried two different RPI versions and different memory cards and stability was horrible in all cases. Making matters worse, seemingly after each crash, I had to completely reinstall the OS and the application.
I’m sure I’ll take a beating for sharing my negative experience but I eventually gave up on it and found a tutorial that showed how to install it on my NAS. I truly commend those who can make it work.