System Information
Operating system:Windows 10
Graphics card: RTX 2070
Blender Version
Broken: 2.90
Worked: 2.83
Short description of error
When hiding vertices, edges or faces to not be affected in sculpt mode, they are still affected while sculpting because they remain as "ghost vertices" that are visible when switching back to edit mode from sculpt mode, making this method unusable.
Exact steps for others to reproduce the error
Create any object (UV Sphere, for example). Switch to Edit Mode. Select any amount of vertices and hit H to hide them. Switch to Sculpt mode and then right back to edit mode. The hidden vertices will reappear without any faces or edges, but are still affected (even if unseen) in sculpt mode.