Cannot move Chimeral inscribed ultimatum to stash tab (2nd trial)

I obtained the Chimeral inscribed ultimatum for the second trial. As I was going there, I dropped two more inscribe ultimatum. I completed one of those two, as it was higher area level (40 vs 38), and obtained the ascendency point. However, I cannot move the original area level 38 inscribed ultimatum to my stash tab. I can't delete it either. I will be forced to run it if I want to free that 1 slot in my inventory.

I don't think this is the intended behavior. Once the trial is completed, any inscribed ultimatum should become movable to the stash tab

+1
But I didn't even finished the quest one, just dropped a higher level one.
1 try, I cannot put it back to the stash.