Kleptomancy Consumable Bug

I found a bug with Kleptomancy - If you get a skill potion and use it for the extra ability point, when you hit level 18 you will still have the level up arrows and message but you can't level anything up, and it's kinda just stuck there. I know it's minor, but I just wanted to point it out. As you can see in the image link, there are greyed out ability upgrade icons stuck there permanently due to me not being able to use the extra point.