For us it was putting a space in the username field of the login screen, and then moving the cursor back to the start of the field.

The username field wouldn’t reset on a failed login attempt, only the password field did. So users would do a visual scan of the username field, confirm that’s correct, assume they miskeyed when entering their password, try again, rinse and repeat.

That and rotating the desktop, switching the keyboard to Dvorak, etc

I had the same microSD card in my various phones for 8 years. In the end, it didn’t fail, I just upgraded. I’ve had my current one for about 3 years now, still going strong