Scroll off set for "Scroll box" is incorrect after scrolling with the mouse wheel

If the user uses a scroll box and then get the offset of the scroll box it will read correctly until the user uses the mouse wheel to scroll down. The scroll offset will then read lower than the actual offset.

1. Open Editor
2. Create New widget Blueprint
3. Add a Scroll box to the designer tab
4. Make the Scroll Box a Variable
5. Add a Text Box (Multi-Line) to the scroll box
6. Create blueprint in attached image
7. Open level blueprint
8. Add the new widget blueprint to the viewport
9. Play In Editor
10. Add Text to the Text box until is starts to scroll
11. Make note of the number that is printed out
12. Place mouse over the scroll box and use the mouse wheel to scroll down
13. Notice that the number in the print string (scroll offset) has gone down but the scroll box did not actually scroll

Expected: The offset would only change when scroll box has actually scrolled
Result: The Scroll offset changes even though the scroll box has not scrolled