[Autumn]

The hotbar in battle lists FP costs of the skills you use but it doesn't update to the new FP cost if it's reduced by various sources such as Efficiency Talents, Vent Petale, Dancing Shiv and Gentle Embers.

For example, Sidecut at rank 3 without Vent Petale will cost 6FP, and with Vent Petale it'd cost 1FP, but it'd still read 6FP on my hotbar.