When I press the keyboard’s up or down arrow while in a width/height/x/y field, the value in the field increments/decrements accordingly. But when I then exit the field, the value spontaneously increases/decreases by 1 or more.
For example, if the x value of a UI element is 100, and I press the up arrow while in the field, the value changes to 101. So far, so good. But when I exit the field (by pressing the enter or tab key, or by clicking elsewhere), the value might spontaneously change to 102.
The application appears to be applying the change in value twice. So if I press the up arrow key twice to increment the value by 2, it gets incremented by 2 again when I exit the field.
This behavior occurs most, but not all, of the time.