Windows (Steam) version 0.21.2
When I was using an Ancient Grimoire and a Faded Grimoire, the spell gems I’d equipped them with steadily duplicated in my inventory. I didn’t realize this at first, and when I went to grind down some of what I perceived as extra spell gems, it destroyed all of them including the ones equipped on the Grimoires.
Now my inventory is cluttered with duplicate spell gems that I’m afraid to grind lest I lose access to the spell entirely.
Also, the Preferred Selection spell gems were never preferred in battle and completely reset afterward (as if I’d never set any preferred selection).