When adding a widget at runtime the widget it appears to clip in correctly. If the widget is more than half way off the screen, the entire widget disappears.
Result: As the widget is just over half way out of the screen the whole widget disappears.
Expected: The parts of the widget that are still within the screen would still be showing as long as they are on screen
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-59114 in the post.