Whilst playing Diablo Immortal, was attempting to change skills on charm using a skill stone. Concurrently a “match was found” in trial of the hordes and I entered. Upon completing trial of the hordes, I went back to attempt to use skill stone and it was gone.
I would click the edit button on your post above and change this to a bug report. Sadly I feel it might get lost with the many other ‘glitch’ bugs but it def is a bad timing one for sure. I’ve learning in the past not to do anything while in queue