We were trying to use CSS Scroll Snapping functionality in our Fire TV web app, but somehow cannot get it to work. We added 'scroll-snap-type: x mandatory;' to the flex container. Also, 'scroll-snap-align: start;' and 'scroll-snap-stop: always;' to container items, but the end result is the same as without those changes.
Also, when we tested whether those properties are supported by CSS, Fire TV was happy to report that all are supported.
Maybe someone from Amazon can also test it, and if the issue will be confirmed file a bug report. We tested against fire stick, fire stick 4k and the first cube - all the same.
Thank you, Jacek