Bug 238152

Summary:	[iOS] Incorrect viewport width after rotating to landscape, then going back cross-origin
Product:	WebKit	Reporter:	Ali Juma <ajuma>
Component:	Layout and Rendering	Assignee:	Nobody <webkit-unassigned>
Status:	NEW ---
Severity:	Normal	CC:	achristensen, bfulgham, cdumez, simon.fraser, webkit-bug-importer, wenson_hsieh, zalan
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified

Description Ali Juma 2022-03-21 13:58:17 PDT

This reproduces in iOS 15.4 on Chrome, Edge, and Firefox, but not in Safari.

Steps to reproduce:
1. In portrait orientation, visit https://www.google.com/search?q=walmart
2. Tap on the link to walmart.com
3. After walmart.com loads, rotate to landscape
4. Tap the back button

Expected result:
Rendered page fills the viewport

Actual result:
Rendered page uses only the left-most portion of the viewport, as if it still has the width it had in portrait mode.

This bug also reproduces with the same steps on bing.com instead of google.com, and with other search terms, so it doesn't seem to be a site-specific bug.

I'm not sure why this doesn't reproduce in Safari; perhaps Safari is doing something that forces a re-layout.

Comment 1 Radar WebKit Bug Importer 2022-03-22 09:09:39 PDT

<rdar://problem/90639341>