Why glitches/bugs in games only affect some copies instead of all of them if they all contain the same code

Question

Why glitches/bugs in games only affect some copies instead of all of them if they all contain the same code

In: Technology

Answer 1

Because they can be caused by how the specific Hardware handles the code.

For example some things mind only show up on weaker hardware as the stronger one can just brute force it.

Or in another case some things can show up on just stronger hardware as the weaker one can’t run the game fast enough for it to break.

It can be caused by lack of video memory, or by lack of system memory, or speed of system memory or speed of drive.

Or any strange combination where the hardware acts differently than the reference system they expected.

You could have bugs and glitches caused by irregular input devices.