If you have more than one button in a vertical stackview, click the first button will also triggers the last button.

1. Create a new single app project
2. Click on story board
3. Add a vertical stack view
4. Add top, bottom, leading, trailing constraint for stackview to its parent.
5. Set vertical stack view to fill equaily (This is an optional step)
6. Add a button into the stack view
7. Add another button into the stack view
8. Add a third button into the stack view (This is also optional step)
9. Run the app in the simulator.
10. Click on the first button.

1. Clone the repository
2. Open StackViewBug.xcodeproj in Xcode (I use Xcode 11.3)
3. Run app in the simulator
4. Click on the first button

Expected behavior: Only the first button should be highlighted when pressed down on the first button.

Actual behavior: The first and third button all highlighted when pressed down on the first button only.

Here is a video screencast to show how to reproduce this issue from scrach Click here

If you put a view underneeth the stack view with at least 1 pt height, it will not have this highlight issue anymore.