Thank you for the reply Bhaelros. I apologize for the delay in our response.

When exactly did this start happening? Do you recall anything changing/updating on your PC that coincides with this?

Have you been able to replicate this with another mouse?

If you have any overlay active (Geforce Experience, Steam overlay, etc.) try disabling it. You may also want to try a clean boot. Simply open the task manager and select the 'Start up' tab. Disable everything here and restart the PC.

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