Steps to Reproduce:
- Create a custom document and configure custom layouts
- Create a custom workflow for said document (example)
- Go to Designer to configure workflow layout
- Drag and drop existing elements in view mode to reorder them.
=> First attempt, no red highlighting to show where element will be dropped
=> Second attempt, red highlighting appears, but element is not properly dropped
=> Element "hangs" in a weird overlay
=> Navigating to a pre-existing document layout (discarding any changes) keeps the overlaid undropped element.
See attached designer-layout-bug.mp4 screencast for demonstration.