Thank you for posting in in the Final Fantasy XIV Technical Support Forums.

When running the game on Direct X 11, have you tried disabling full screen mode? If not please do the following:

- Please find the "ffxiv_dx11.exe" and right click it and select properties. Then under the compatibility tab there will be a check box labeled "Disable Full Screen Optimizations". Check it and click apply.

In addition to the suggestion above, please try the following:

-Try switching to DirectX 9 by selecting the ‘Config’ button on the launcher
- Make sure drivers are up to date
- Disable any overlays ( Discord and other programs)
- Change screen resolution ( try playing in " windowed" mode, fullscreen mode or border less fullscreen)

Hope to see you online!