Operating system: Windows 10 Pro
Graphics card: RTX 2080 Ti + 3x 1080ti for rendering
Short description of error
As the title says, step by step directions to duplicate below
Exact steps for others to reproduce the error
Create a cube, and a couple shape keys and set them however you like. Observe them working.
Now go into the base mesh, do an inset and an extrusion. tab out of edit mode and observe the extrusion snapping back to the surface. tab back into edit mode, grab the face and move it again, and this time it'll stay put. Observe everything working.
*It doesn't need to be re-extruded, the extrusion is done, the face just needs to be relocated.