System Information
Operating system: win 11
Blender Version
Broken: 67f5596f194c
Short description of error
It is not possible to edit shapekeys if the object has a Surface Deform modifier applied. This does not seem to be an issue with the Mesh Deform modifier.
Exact steps for others to reproduce the error
Load the attached .blend file
Select the torus object and make sure "Key 1" is selected
Change to edit or sculpt mode and try to modify the mesh