System Information
Operating system: windows 10
Graphics card: intel

Blender Version
2.81

Short description of error
multires used to work with sculpt mode by letting the user move to lower resolution levels, do sculpting there and then move back up. Now sculpt mode only works on the highest level of subdivision.

Exact steps for others to reproduce the error
add multires to any mesh, subdivide several times, change to sculpt mode, now going to lower level in multires and nothing changes.