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Extrusion reverts if shape key is present.
Open, Confirmed, LowPublic

Description

System Information
Operating system: Windows 10 Pro
Graphics card: RTX 2080 Ti + 3x 1080ti for rendering

Blender Version
Broken: RC1

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.

Details

Type
Bug

Event Timeline

That issue is reproducible in 2.79 as well and it seems to be affecting all transform actions (move, rotate, scale) if you do Inset at any point during one Edit Mode session. If you do Inset first, tab out and then tab back in to Edit Mode, the same extrusion or other actions will stay where they are supposed to. Same thing happens both on Basis and other Shape Keys; you don’t have to create any Shape Keys at all, just add Basis and transformations will revert themselves even if you do Inset after other transform operation (for example Extrude, move some polygons around, Inset and exit Edit Mode).
Edit – same trick seems to be working with Bevel Edge and Bevel Vertex – if you move sub-objects around and do Bevel at some point, after you exit Edit Mode sub-objects will revert to their original positions. I’ve tried other modeling tools but so far I was able to find that only Inset and Bevel seems to be doing that.

Sebastian Parborg (zeddb) triaged this task as Confirmed, Low priority.Jul 17 2019, 2:49 PM