Spin box does not receive input in mobile preview

When using a spin box in mobile preview, the spin box does not appear to update. It will highlight when the mouse is over it but clicking and dragging will yield no value changes.

1. Open Editor
2. Create a new widget blueprint
3. Add a Spin box to the designer tab
4. Save and Compile
5. Open level blueprint
6. Add the new widget blueprint to the viewport on begin play
   Beginplay > Create widget > Add to viewport
7. Play in mobile preview
8. Click and drag on the spin box
9. Notice that the value does not update

Expected: The value would change when the user clicks and drags on the spin box
Result: The value does not change when the user clicks and drags on the spin box

Fix UE-51650

i have this problem UE4CC-Windows-58DC12AF4B97F057BD108FBFF569B2E9_0000

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