vertices visibility in sculpt mode using shape keys - regression #65850

System Information
Operating system: Windows 10
Graphics card: nvidia 1060 Ti

blender-2.80-87de71a8aaa0-win64

In previous build ( some weeks ago) it was possible to hide a bunch of vertices in edit mode and keep them hide in sculpt mode too, while using shape keys. This was very usefull for example to work on inner mouth of a character etc. Now if you create a shape key the whole mesh will be visible. Is this an intended behavior ? or just a temporary regression ?

Exact steps for others to reproduce the error

Add UV Sphere
Edit mode - select and hide a bunch of vertices
Sculpt mode
Create shape keys

Added subscriber: @DanieleViagi

Added subscribers: @fclem, @ZedDB

@fclem this seems to be a drawing issue and the hidden verts can't be modified with the sculpt brush strokes (but they are still drawn)

This issue was referenced by 56ec8108e2

Changed status from 'Open' to: 'Resolved'

Thank you Clément now it works, although i found another (related ?) bug. Same thing happen if you have a sculpt mask and create a shapekey; the sculpt mask is no longer visible.

Added subscriber: @kursadk

This behavior is broken in 2.83 nightlies. I cannot hide any part of the mesh using box hide if the mesh has any kind of shape keys.

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vertices visibility in sculpt mode using shape keys - regression #65850