i see there a big problem
the chain u send out is not only different from the block explorer chain its also different from the bittrex chain
u should request bittrex set ERC into maintainance without deposits and withdraw until this issue is solved
we talking here about a major issue
no one should deposit or withdraw from exchanges until that situation is solved
The Bittrex Exchange running correct. I've it tested yesterday. Also all my wallets are correct. The Explorer is forked by block 921100 ~. My Chain is
12:29:50

getblockhash 922040
12:29:50

3f0491da78654cded23cab0346b0528504d96f4b3d9d9ebb2f1509c2a1d1e2fb
You must only wait. The wallet is in "preload tx modus". You see a stuck but the wallet works. You can start the wallet with -debug. Here can you see the "preload".
"preload tx modus" isn't only a dummy word for the works. It is a little different.