Orb of Storms 5th link support gem bug

When I equip a 5th support gem in my Orb of Storms, the skill becomes unusable. It disappears from my keybindings and spell/attack slots.

Here is how the UI looks with 4 support gems:




And here is how it looks when I try to equip a 5th gem. All the information just disappears. Where does it go?!

This happened after I obtained my first ascendancy, Deadeye. Up until that point, it worked fine.

Do you have enough dexterity to meet support gem cap requirements when using your 2nd weapon set + passives?