**System Information**
Operating system: i7 4770k
Graphics card: nvidia GT730
**Blender Version**
Broken: (example: 2.80, edbf15d3c044, master, 2018-11-28, as found on the splash screen)
Worked: (optional)
**Short description of error**
object (sofa seats or cushions) is not properly sculpt every it need to change preview to check the sculpting..also some time mesh will distorted very badly..{F7059615}
**Exact steps for others to reproduce the error**
Based on the default startup or an attached .blend file (as simple as possible).