Its part of the old recast bugg which seems to get worse every patch, usualy(90% of the time) it will start happening whens you set traits/abilites or just even enter that screen sometimes.
Only way to solve is to relogg fully (close XIV completely) and the only way to prevent it is to not use abilites & traits menu unless you absolutely have too.

The bugg will make your spell cooldowns show up incorrectly on your action bar, can show ready 2-10sec before they actualy are on, its very frustrating and confusing when it happens, and many times it makes the game feel like unplayable.