Exr-io alpha issue

[ioioiofilip]

I'm using the Photoshop exr-io plugin to import multilayer 32 bit .exrs but having issues with the "add alpha to all layers" whenever I render against a non-pure black background (environment with no other geometry behind the object). It produces a weird jagged white edge around the objects like it's multiplying the alpha channel. I tested with other engines and the issue doesn't seem to be the exr-io plugin as far as I can tell. Switching to 8bit seems to alleviate this effect.

I've added a black background in PS to illustrate the issue.

Has anyone experienced this?