Each touch event was awaited before the next went, so on a busy machine a
drag's ten messages took longer than the 800 ms a swipe has, and the page
took it for a slow drag. Reproduced by spacing the messages 110 ms apart:
the swipe back stayed on Second Episode, as the failing run did. The page
is right to want a swipe quick; a finger does it in well under that.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>