Hey here!
We do accept Easy Release releases. If the information is entered correctly, any standard model release should usually be accepted.
Just in case, one issue that happens often is the photographer and model signing on a date and then the witness on a different date. Also, using releases in other languages may cause problems occasionally.
However, the best solution is to contact support with the ID of one of the images with the "problematic" model release so they can examine it and give you more information.