The Youtube mobile app is a nightmare to use, and has been for months (desktop is working quite well but I am using my phone 95% of the time). Reopening a short shows me a few frames of the next video before freezing, shorts die on second play constantly, history crashes because of shorts, changing to videos brings them back but navigating to shorts crashes again.
This has been reliably going on for at least 6+ months, I thought shorts was a big priority for them, but the UX is and remains horrible.