Ahh so I am not alone!! Me to I tried to withdraw about 8h ago, and it is locked onto pending state. The support said escalating the issue (= do nothing?), after that no update. Something is going on with them... Once this get resolved, and dont go back to bittrex again. They keep me in the dark and lock my money..
and by the way just before the withdraw, i did an experiment with 1STEEM, that worked. So I was even careful, but no consistency...