groom issue 5.6 - 5.7, blured

Hi everyone,

I’m having a serious issue with Groom rendering in Unreal Engine 5.6 and 5.7.
This happens in a completely clean project, using a default Metahuman with no modifications.

The problem:
When I enable Depth of Field in a CineCameraActor, the Groom becomes fully blurred or reads the wrong focal distance.
The character’s body and the rest of the scene are perfectly sharp.
Only the hair/groom gets pushed out of focus, even when the camera focal distance is correct.

Important details:

  • Clean project

  • Default Metahuman

  • No custom Groom settings

  • Default camera

  • No post-process overrides

  • Happens on UE 5.6 and 5.7

  • Anti-Aliasing (TAA/TSR) does not change anything

  • Stable Rasterization does not change anything

  • Creating a new camera does not change anything

  • Everything else renders correctly, so it doesn’t seem like a hardware issue

It looks like DOF is calculating the Groom depth incorrectly in these versions, but I can’t find any up-to-date information about this.
If anyone from Epic or anyone who has dealt with this can confirm whether this is a known issue or if there’s a new setting related to Groom + DOF that I’m missing, I would really appreciate it.

Thanks in advance.