Spirit skill is on but no reservation happens on weapon slot 2

When defining weapon swap on spirit reservation skill cast on shock, I am able to reserve spirit on both weapon slots, but the reservation does not go through on slot 2. I have enough spirit on slot 1 and 2.

Skill says "on" but isn't actually on when weapon set 2 is enabled.

Spirit is not reserved on slot 2

Have tried:
removing weapon from slot 2
Swapping weapons from slots
Checking attributes on weapons to see if that's an issue
Logging out and in with the cast on shock enabled/disabled
Character selection with enabled and disabled


Impact:
This makes it so any time I swap weapons it resets the energy for cast on shock, making it a bricked gem.


Things to try:
Having more spirit to check if it's some double/float value calculation (miniscule rounding error)
Getting another cast on shock gem to check if it's that specific gem that is causing the issue.
Logging into a different platform with the same character

Platform: Xbox
Account: PC (this one that's posting)
Class: Sorceress, Stormweaver

I'm experiencing something similar but with skeletal minions and my issue is with slot 1. For the life of me I can't figure out if I'm doing something wrong -- or if it's a bug.