Too many spells for spellcasting menu 0.8.4

My Djinn Pyromancer has 8 Spell Gems equipped, and gains 11 more at the start of combat from my Ashmouth Cerberus. But the spellcasting menu only ever has one page, so I can’t really cast all of the spells.

OK so now it works… I’ll pay attention if it happens again and try to discern what might have caused it

Yeah come to think of it, maybe it was only like a hidden trait on one of the dudes in a Nether Realm blocking some of my gems and making it look like that.