Blender Version
Broken: 2.79b, 2.80, 2.81, 2.82 (ba1e9ae4733a)
Short description of error
Unlike Loop Cut that seems to do it, Offset Edge Slide does not switch selection mode correctly when used in face select mode. Even though current selection mode appears to switch to Edge, edge highlighting remains as if current mode was Face, both for selected and unselected edges.
Exact steps for others to reproduce the error
- Load the default scene
- Enter edit mode on the cube and switch to Face selection mode
- Select two opposite faces
- Use the Offset Edge Slide tool (either the active one or via shortcut)
Edge highlighting will remain as if selection mode hasn't changed. See image below


