[Amp Story] [Page attachments] [Inline] Attachment header doesn't stick to top of viewport

[processprocess]

Description

The header does not stick to the top of the viewport.

Tested in iOS Chrome, & iOS Safari.

RPReplay_Final1621880572.mov

Reproduction Steps

1. Navigate to this demo in iOS chrome
2. Open the CTA BUTTONS V2 story
3. Navigate to page 25
4. Swipe up or click the "About The Artist" CTA
5. Drag attachment up past top of viewport.

Header should stick to top of viewport, instead it is scrolling beyond.

Relevant Logs

No response

Browser(s) Affected

iOS Chrome
iOS Safari

AMP Version Affected

2105072136000 with experiment amp-story-page-attachment-ui-v2 forced on in demo story.

[coreymasanto]

@gmajoulet should we associate this bug with the attachment forms project, since we'll soon want to resolve this in order to ensure that the publisher domain is always visible at the top of the attachment?

[processprocess]

This broke in dev mode as part of #35823

However this bug is still present on iOS when manually reverting that commit.

[gmajoulet]

Closing as the commit introducing the issue was rolled back.

[processprocess]

Closing as the commit introducing the issue was rolled back.

This was an issue on iOS before that commit actually. I think we need to re-open it for tracking.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 7 days if no further activity occurs. Thank you for your contributions.