2037869 - Repeating of text in text fields on most websites (Samsung)

Status: UNCONFIRMED

(Firefox for Android :: General, defect)

Description

[Nishchay [:nish]]

Attachment: Screen_Recording_20260507_183657_Firefox Nightly.mp4

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0

Steps to reproduce:

while the bug happens on most website, the best for reproducing this:

1. https://plnkr.co/edit/?p=preview&preview (from javascript.info
2. hold down on a line -> dismiss context menu -> now you can type (otherwise unable to type in text field)
3. type anything ex: help

device specs:
Galaxy S9 FE+ (SM-X610)
android 15 - one ui 7.0

samsung keyboard:
Version 5.9.12.10
Predictive text -> on
auto replace/suggest text corrections -> off

Actual results:

the text repeats itself.

1. I can reproduce this issue(not as easily) on most websites including google search.
   That's another part of the issue, its very painful to reproduce it consistently on most website (other than the one i provided in test case) but happens enough times to make it very annoying to use the browser

2. I have attached screen recording of the issue on the test website and on google search

3. this is probably a samsung only issue, and is exactly of this type- https://github.com/Acode-Foundation/Acode/issues/1057#issuecomment-2431617596
   (in the bug report (which still is reproducible) a repo member mentions

The Sora editor has the exact same issue, and I think the Ace editor has this issue too. It probably occurs due to multithreading/worker issues.

Expected results:

No repeating of text

Comment 1

[Nishchay [:nish]]

Attachment: reproducing the bug on google search

Comment 2

[Nishchay [:nish]]

Attachment: another google reproduction example

one more thing: This started happening on nightly, from about a month ago...(unlike those github repo, which has this for years)

Comment 3

[Titouan Thibaud [:titouan]]

Hey,
Thanks for the report.
I couldn't reproduce the bug on a Samsung Tab S9, Android 16, using the Samsung Keyboard with Predictive text on and auto replace/suggest text corrections off.

Do you know if the same issue is reproducible with Chrome, on the same website where you can reliably reproduce it? 

Thanks for your help!

Comment 5

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

The Bugbug bot thinks this bug should belong to the 'Firefox for Android::Toolbar' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Comment 6

[Nishchay [:nish]]

Attachment: test website on chrome

yes it appears to be reproducible (only on editing text though).

also an update: I tried HeliBoard and with it i cannot get it to reproduce on chrome on that website (even editing text), however on firefox issue is still there (a single h becomes hh and so on)