Can you take a screenshot of your inventory with the jinxed item selected? Might help if we can see what you see.Yep, no option to unjinx. I'm still playing around looking.
As for typing buggy, I can't find a place to type it. I tried just typing on the screen but got nothing. Never mind; it loaded up randomly after I clicked the option and then resumed.
I already completed the essences/jinxes quest early in the game though; nothing I can do with that right now.