Hi, I also have a similar problem and can confirm recently I tried to transfer a HMQ to bittrex ETH wallet and it did not work. However, sending HMQ or ETH from my bittrex to ETH wallet was not problem.
Also, sending HMQ directly to my HMQ account on bittrex was no problem.
As I paid through bittrex, this is the only way I will receive my HMQ tokens. I am still waiting but at least one support member has said they will be sending my tokens soon.