tiny holes in particles

Hello, I'm reporting an issue on the particle system.
First there is something that is not really an issue but it's not intuitive and maybe it can be changed:
When placing hairs for ground cover, the mesh must be rotated around the X axis by +90°, the object itself must not have rotation.

Now when rendering, the particles have a hole. This part of the mesh which doesn't seem to correspond to a full face, rather maybe a ground of fragments, is popping up beside the meshes.

@moisesjpelaez i'm pinging you here following our exchange on discord.

Reproduce the particle-system render with the reported ground-cover mesh orientation: rotate the mesh +90° on X while leaving the object unrotated. Inspect the particle rendering path for the holes and displaced fragments; done means the rendered particles no longer show either artifact. No source file or test is identified in the report.

Written by the indexing model from the issue text.