1935650 - tripadvisor.com - "Reserve Now" button disappears when scrolling to the bottom of the page with "Scroll to hide address bar and toolbar" enabled

Status: NEW

(Firefox for Android :: Browser Engine, defect)

Description

[Calin Tanase]

Attachment: tripadvisor reservation FF vs Chrome.mp4

Environment:
Operating system: Google Pixel 5 (Android 14) / OnePlus 6 A6000 (Android 11)
Firefox version: Nightly 135.0a1-20241202093851

Preconditions:

• Make sure "Scroll to hide address bar and toolbar" is enabled in the browser settings

Steps to reproduce:

1. Go to https://www.tripadvisor.com/AttractionProductReview-g14133673-d15180540-Mt_Fuji_and_Hakone_1_Day_Bus_Tour_Return_by_Bullet_Train-Nishishinjuku_Shinjuku_.html
2. Scroll down a little and tap on "Check availability".
3. Scroll down to the bottom of the page.

Expected Behavior:
The "Reserve Now" button is still visible.

Actual Behavior:
The "Reserve Now" button is no longer visible.

Notes:

1. Screen rec attached
2. Reproducible regardless of the ETP status
3. Reproduces partially on Firefox Release, its still visible but not fully
4. Not reproducible on Chrome
5. Issue found during WebCompat team [Top100] websites testing

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

Since nightly and release are affected, beta will likely be affected too.
For more information, please visit BugBot documentation.

Comment 2

[BugBot [:suhaib / :marco/ :calixte]]

The severity field is not set for this bug.
:royang, could you have a look please?

For more information, please visit BugBot documentation.

Comment 3

[Roger Yang [:royang]]

Is this viewport related?