Good afternoon and thank you for posting on the Final Fantasy XIV Technical Support Forums.

What kind of mouse do you have? Is this a recent issue or has it been around for a while.

Does this occur every time you try to use the actions or only some of the time?

Have you attempted to change the input to something other than shift? Does this have the same result?

We hope we can be of assistance in helping you enjoy the exciting world of Final Fantasy XIV!