**System Information**
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce RTX 2070 SUPER/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 442.92
**Blender Version**
Broken: version: 2.90 (sub 0), branch: master, commit date: 2020-05-01 14:06, hash: `rB60741cfe181c`
Worked: (newest version of Blender that worked as expected)
**Short description of error*
Multires Rebuild Subdivision shrinks shape
**Exact steps for others to reproduce the error**
Create cube
Create multires with 2 levels and apply
Create multires and Rebuild subdivision
Start and rebuild shapes are different{F8506075}
Same for simple subdivision modifier