Occasionally in battle, you will have no actions available to perform (see screenshot).
My best guess for steps to reproduce:
1. Have a character that can draw aggro in your party
2. Enter battle and set battle settings to auto
3. Click auto rapidly
4. When said character draws aggro, there are no available buttons to click.
The game is not totally locked at this point, the rest of the interface still works as intended (you can click on your characters to see stats, hover over status conditions and see the tooltips, etc.)
My best guess for steps to reproduce:
1. Have a character that can draw aggro in your party
2. Enter battle and set battle settings to auto
3. Click auto rapidly
4. When said character draws aggro, there are no available buttons to click.
The game is not totally locked at this point, the rest of the interface still works as intended (you can click on your characters to see stats, hover over status conditions and see the tooltips, etc.)