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Sculpting and Multires Redo queue jumbled
Confirmed, NormalPublic

Description

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: GeForce GTX 1060/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 461.40

Blender Version
Broken: version: 2.91.2, branch: master, commit date: 2021-01-19 16:15, hash: rB5be9ef417703

Short description of error
Trying to perform a redo on brush strokes performed right after adding a multires subdivion level either don't work at all or merge brushstrokes together.
This behaviour was discovered after finding an undo bug in Release Candidate for 2.92

Exact steps for others to reproduce the error

  1. Create New Scene -> Sculpting
  2. Add Multires Modifier
  3. Press "Subdivide" (doesn't matter how often)
  4. perform a few brush strokes on the mesh and then perform as many undos (until the sphere is clean again)
  5. perform redos of these brushstrokes

Sometimes two strokes reappear at once sometimes they are additionally clipped.
Demo video recorded with the steps above:

Event Timeline

Pratik Borhade (PratikPB2123) changed the task status from Needs Triage to Confirmed.Sat, Feb 20, 7:45 PM

Can confirm the issue for version 2.93.0 alpha , hash : 7a608f88a71 . Issue occurs in case steps Create New Scene -> Sculpting are followed to open sculpting tab .
opening general file then switching to sculpt mode does not reproduce the error .