System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: GeForce RTX 3090/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 461.72
Blender Version
Broken: version: 2.93.0 Alpha, branch: master, commit date: 2021-03-29 22:00, hash: rB91c44fe88547
Worked: (newest version of Blender that worked as expected)
Short description of error
Reproducing the steps in T69634 with a simple drawing will not result in any problems, but when working with multiple keyframes and more complex drawings, this error occurs.
Using the Stroke Cutter Tool, will remove everything on locked layers, locking all layers and cutting will remove every stroke.
Exact steps for others to reproduce the error
Use provided .blend
Use Stroke Cutter Tool, alternative between locking layers