Gravity Forms eWAY v2.2.1 has just been released, with fixes for a plugin conflict and a Recurring Payments fatal error.
Where forms were created with the Recurring Payments field, hiding the optional sub-fields caused a fatal PHP error when submitting the form on some websites. This seems to only happen with forms that were created with fairly old versions of the add-on. The problem is now fixed.
A user of this add-on tripped over a problem caused by the T2T Toolkit plugin. That plugin breaks the form total field posted back to the website by Gravity Forms, when there was a product with an options field. Weird, and no errors anywhere (not even the browser console). I’ve added a work-around so that such problems don’t stop the form total from being calculated.
You can update to the latest version from your WordPress plugin admin page. Here’s the full changelog for Gravity Forms eWAY.