What's the issue?

On my Google Pixel 3, when scrolling through the AMP lightbox gallery, it skips an image... I swipe over to the next image, and while swiping everything seems fine - I can see the current image moving over and the next image coming in. But when I'm done swiping, it just skips to the image after the one I was swiping to

How do we reproduce the issue?

Here's an example of the issue: https://codepen.io/maxpelic/pen/KEEQMz?editors=1000
It only works if you swipe the image most of the way over before releasing

1. Open the link (I've only tested it on my Google Pixel 3)
2. click on an image to open the lightbox gallery
3. swipe over to the next picture

What browsers are affected?

Google Pixel 3 - Google Chrome (stable release)

Which AMP version is affected?

Here's the version I'm using: 1903141753530