In the settings for Windows 10, you can reverse the vertical scrolling direction of the trackpad.
Normally, this has no effect on the horizontal scrolling direction. For example, in Illustrator and other programs, when you use two fingers to swipe left, the viewing area moves to the left (i.e. the document moves off to the right). This is the behavior of every program on the planet, Windows and Mac, except for Photoshop.
What happens now in Photoshop is that the horizontal scroll is also incorrectly reversed if you choose to reverse your trackpad's vertical scroll direction. This is clearly a bug as the behavior doesn't take place in any other Adobe products.
Someone mistakenly must have used the vertical reverse flag to also multiply the horizontal scrolling distance * -1. It's extremely annoying and counter-intuitive when trying to move around images. Please fix!