Here is the rundown. While using a Hydrahedron setup I start off being able to cast both Runic Invocation annd Flame Rush (which autocasts Runic Invocation). At first every time I use Flame Rush it extends the cooldown of Runic Invocation. Then eventually after being on the map for a while I just cannot cast Runic Invocation directly at all, this resets when I change maps. I have scoured my passives and skills and I cannot for the life of me figure out why this is happening. Here is a link to my character. I also have a screen recording, but I don’t know if that is allowed here.
https://www.lastepochtools.com/profile/FastCaps/character/Hoid
For the record I know casting it directly is not the goal. I just don’t understand why I can’t.