**System Information**
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: GeForce GTX 1080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 451.67
**Blender Version**
Broken: version: 2.90.0 Alpha, branch: master, commit date: 2020-07-15 13:20, hash: `rB613d314251f3`
**Short description of error**
Object with hair particles is duplicated as linked. When motion blur is on there's a weird smear, even though there's no movement in the scene:
{F8697304}
**Exact steps for others to reproduce the error**
- Open attached file:
{F8697311}
- Render frame.