Playing heroic, anomaly mode, on mobile if it’s a factor… When you choose a deck, it auto reallocates you to the first deck… so, Kirin Tor Citadel, heroic, anomaly mode (any and all of them it still happens), go… Rogue, choose, yoink, then starting deck, ok, so, Kobold’s desire, play…
View deck before the first match starts, ok all good, still the same deck, Kizi’s first… PLAY…
ANNNNNND… starting hand is, SKULKER, nay on Kobold’s desire… CONCEDE 
View deck before leaving, and yeppp Switched to the first deck, SKULKER…
This has happened with other classes, Hunter and Warrior as well…
Bug, Glitch, whatever it is, please fix… is it a mobile specific issue, not sure, just, not sure…