Spectres disappear if you unequip/ move the gem to a new armour/ level it in Lab font

Hello,

I got 2 a Perfect Primal Thunderbird and Perfect Warlord which disappeared after I moved my Raise Specter gem to a new gear. It didn't leave any corpse or anyway to recover them. Also, ran an uberlab and had the option of leveling up the gem and my spectres disappeared when I took gem out to lvl it, there was no corpse to resurrect and they just disappeared.

I've gotten the same bug by putting my Raise Spectre into another helmet.

Please fix, this costed me a ton.