https://bitcointalk.org/index.php?topic=2012475.2320
>After contacting Nova, Nova informed me of the problem, but as of yet has not moved forward to solve the problem (despite my request to do so).
>According to Nova, deposits were getting "stuck." That is all the information I have. I have three guesses as to why this might be:
>1. TME's transfer function is slightly more expensive than average, due to the parent-child checks. If an insufficient amount of gas were provided, a withdrawal transaction could run out of gas and the deposit would appear "stuck." This seems like a trivial problem to solve, however.
>2. Lack of full ERC-20 compatibility. Without knowing exactly how Nova's wallet is managed under the hood, it's not possible to know whether this had a role or not.
>3. High volume. Just another guess.