Spirit Bug with Temportal Rift (Chronomancer)

I have 137 Spirit, and I use Cast on Freeze and Cast on Ignite (60 each). I have 17 Spirit left.

I have the Temporal Rift skill without any gems, and then I put the Clarity Support Gem on it (it says additional 10 spirit reserved). After I put them Gem in, the skill becomes disabled, even though I have 7 Spirit left over.




Not sure what I could be doing wrong, seems like a bug