How long does it take for a bittrex BTC deposit to show? It has been a few hours and I did a test BTC transaction and I see it in pending deposits.
Sometimes this does happen and you just have to be patient. Bittrex is not completely real time and does have occasional lagginess that you just have to get over with. I probably have this problem every 1/10 deposits i make.
It's quite common and nothing to worry about.
You should be able to get your deposit credited straight to your balance without it ever showing up on pending deposits when this happens. I have no idea why this is the case but it seems like it's how bittrex works sometimes apparently.