I'm not sure that the motions are always consistent, but that's probably user error more than the game's programming.

I have no idea why - probably user error, but still, didn't endear me to the program.

Another common user error is leaving a laptop plugged in all the time.

Most accidents are the result of user error leading to an isolated fall.

These last two methods reduce the possibility of user error.

Conflicting data may also be the result of user errors.

These phrases are used as a humorous way to describe user errors.

He informs him corporate investigated the issue, and every time it was a user error.

I concede that the problem may have been user error.

Maybe it is user error, but everything worked fine until the last update.