Why does my mesh get distorted when switching from edit to object mode? Whenever I create adjustments to a mesh in edit mode (covering body with clothes for example), when I switch back into object mode the mesh distorts weirdly as shown below and shoots out in all directions at a random point in the mesh:



Why does this keep happening when I switch from edit to object mode and how can I stop/ revert it without deleting what I just edited (happened at least 4 times now)?
I duplicated, Z-grabbed and separated a "shin-loop" from a Make Human,  built it into a boot shape (I wanted to keep the vertex groups for weight painting). When I changed to object mode the mesh completely distorted.

Looking at the shape keys under Mesh I unticked the Relative check box - this seems to have worked.