The location give by the Get hit result under finger by channel appears to be affected by screen size on Mac. When clicking an area in the level, it does not always return the area under the finger as expected.
Result: The character does not go towards the area that was clicked
Expected: The character would walk towards the spot clicked in the level
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-59015 in the post.