I sent xem to Huobi yesterday and got nothing.
Their support said:
google translated message:
Due to an official announcement by NEM.io Foundation Ltd, the missing XEM from Japanese trading platform Coincheck was tracked and marked. NEM’s blockchain network will be affected before processing is complete. To protect the user’s assets, we immediately suspend the XEM recharge, to be restored after the official NEM official recharge. At the same time XEM’s bills are not affected.
What should i do now? Just wait but how long?
I asked about it in bitcointalk and found out the same message you get in Poloniex:
XEM is currently under maintenance or experiencing wallet/network issues. Deposits and withdrawals will remain disabled until a solution is found, which may require an update from the XEM team. Any updates must be tested and audited before enabling.