Alembic Hair Groom Asset + DoF = artifacts around edges

Hair assets show artifacting between strands when used with DoF.

Confirmed in MAIN 4.25 @ CL 110623791

1. Enable alembic groom importer and groom plugins.
2. Import Groom asset. (I found one here https://jira.it.epicgames.net/browse/UE-82204 )
3. Add a cinematic camera with shallow DoF (I needed to view cinematic camera via Sequencer since hair did not appear in preview)
4. View hair in focus against an out of focus background.

Result: Depth of field artifacts around hair strands.