**System Information**
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce RTX 2060/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 446.14
**Blender Version**
Broken: version: 2.90.0 Alpha, branch: master, commit date: 2020-07-02 22:21, hash: `rB5a13f682ee5f`
**Short description of error**
Local rigged characters have MB even with Steps = 1.
Same character linked in a new file has no Eevee MB with Steps = 1 (you have to raise above 1).
It seams to affect only deformeble meshs.
**Exact steps for others to reproduce the error**
Take any a charcater (local to the file). Animate its Armature. Render with Eevee MB with Step 1.
Link the same charcater to a new file. Animate its Armature. Render with Eevee MB with Step 1.