I deposited 11.72371116 ETH from my Bitstamp account to ETH deposit address in YObit at around 3 pm EST on 2/19/2018 but it didn't came through on YObit. I received a confirmation email from Bitstamp that it was transferred from their end but I did not see it come through in YObit.
Yobit apparently does not accept deposits through smart contracts.
Bitstamp apparently sends ETH through smart contracts, and that is leading to yobit not being able to credit your deposit automatically. Nothing you can do on forum, because yobit doesn't really look at bitcointalk anymore. Apparently sending a ticket through with russian will be more productive, I don't know if that's true.
They'll have to basically verify your transaction manually and credit it.
But yobit is a horrendous exchange that nobody should use anyways.