Sounds to me like a bit depth conversion problem, I’d say try converting the footage to the BM RGB 10 bit codec and see if it goes away. Also, check and make sure your FW is up to date in the card by downloading the latest installer from the BM website. The EIZO works very well, especially with the HDLINK pro for monitoring LOG footage on set, although it does still suffer from off angle black lift like many other LCD’s.
-Sean