1722262 - [Bug]: Uncontrolled/fast scrolling on zoom-in gesture on sites with zoom locked

Status: RESOLVED DUPLICATE of bug 1685648

(Core :: Panning and Zooming, defect)

Description

[Petru-Mugurel Lingurar [:petru]]

From github: https://github.com/mozilla-mobile/fenix/issues/20501.

Steps to reproduce

1. Open page when zoom-in gesture gesture is blocked - when try to zoom in by touching screen with two fingers and increase distance between these fingers the page does not zoom-in.
   Exaple page: https://support.mozilla.org/pl/kb/nowosci-w-firefoksie-dla-androida?as=u&utm_source=inproduct&redirectslug=nowosci-w-aplikacji-firefox-dla-androida-w-wersji-79&redirectlocale=pl
2. Try to zoom in with two fingers placed vertically and increase distance between them.
   2a. When only one of the fingers is released from screen then page position immediately jumps to the seconds finger that stiil touches screen. https://youtu.be/kULJ0rqfi2I?t=26
   2b. When two fingers are released almost simultanuously then screen starts to scroll vertically very fast. The velocity is proportional to the distance made by fingers during zoom-in gesture. https://youtu.be/kULJ0rqfi2I?t=59

Expected behaviour

When zoom-in is locked on page then zoom-in gesture should be ignored and page should not jumping or scrolling with uncontrolled manner.

Actual behaviour

After zoom-in gesture the page jumps or fast scrolls with uncontrolled manner on pages with zoom-in locked.

Device name

Xiaomi POCO X3 NFC 6/64GB M2007J20CG

Android version

Android 10

Firefox release type

Firefox

Firefox version

90.1.2 build #2015823035

Device logs

No response

Additional information

No response

Change performed by the Move to Bugzilla add-on.

Comment 1

[Timothy Nikkel (:tnikkel)]

Sounds like a dupe of bug 1685648?

Comment 2

[Petru-Mugurel Lingurar [:petru]]

Seems like it, thanks!