Bug 251378

Summary:

Fullscreen page appears completely misaligned on scrolling up and down

Product:

WebKit

Reporter:

joemerramos

Component:

WebKit API

Assignee:

Nobody <webkit-unassigned>

Status:

NEW ---

Severity:

Normal

CC:

ajuma, jer.noble, ntim, simon.fraser, webkit-bug-importer

Priority:

Keywords:

InRadar

Version:

Safari 16

Hardware:

iPhone / iPad

OS:

Unspecified

Attachments:

Description	Flags
Reproducing bug	none

Description joemerramos 2023-01-30 11:53:39 PST

Created attachment 464756 [details]
Reproducing bug

When using the fullscreen API, scrolling down then scrolling up will cause the fullscreen to misalign and cause the screen to be in a broken state making it hard for users to properly use or exit fullscreen mode. 

Steps to repro:

On Safari: 
1. Navigate to https://davidwalsh.name/demo/fullscreen.php 
2. Tap on the Launch Fullscreen button
3. Tap on the > Back to: Fullscreen API button 
4. Scroll up and scroll down

Observed results:
Fullscreen page is misaligned on scrolling up and down 

Expected results:
Fullscreen page should not misalign on  scrolling up and down

Comment 1 Simon Fraser (smfr) 2023-01-30 13:21:18 PST

Is this new in iOS 16?

Comment 2 Radar WebKit Bug Importer 2023-01-30 13:23:00 PST

<rdar://problem/104834393>

Comment 3 joemerramos 2023-01-30 13:30:39 PST

I just tested on iOS 15.5 and was able to reproduce.