Hi, I want to add some of my findings on this issue as we’re dealing with something similar and maybe serve as a workaround in the meantime.
I found that all the camerras and passess are in a single exr as different layers. Depth, WorldPosition and Normal channels are also included there fore each of the cameras. Disabling Multilayer in the exr settings will create an exr for each layer of each camera as a different file, it will also create the necessary folders if {camera_name} is added to the save path.
There’s an extra issue that I may want to report separately, when rendering multiple cameras, only ObjectIds (HitProxyMask) of the first camera are rendered.