Paste into Message Edit Field Not Working

[JamesPC44]

Steps to reproduce

Begin writing a new message in any room in element

Paste from the clipboard (must have data)

Outcome

What did you expect?

Clipboard content to be pasted

What happened instead?

Nothing

This works on Chromium Version 123.0.6312.122 (Official Build) snap (64-bit) on the same machine. All FF extensions were disabled for testing. Has been an issue for probably over a year. Has not been an issue on any other website that I have seen in the meantime. Ctrl+v and pasting from the right-click menu are both affected.

Operating system

Ubuntu 20.04

Browser information

Firefox 124.0.2

URL for webapp

app.element.io

Application version

Element version: 1.11.64 Crypto version: Olm 3.2.15

Homeserver

matrix.org

Will you send logs?

Yes

[JamesPC44]

Logs sent!

[t3chguy]

Can you check about:config for dom.event.clipboardevents.enabled - if it is false (disabled) then the is a non-standard behaviour in the web and unsupported. See #25544

[JamesPC44]

It is false

This is very disappointing to see not planned. I've had that on for well over a year, and this is the only site I have this issue with. Disabling clipboard events is valuable as it prevents pages from blocking copy/paste. Since Element (presumably) isn't doing that, I fail to see why we can't let "normal" copy/paste work. This not working lead to me moving away from Element, I figured it would start working again.

[t3chguy]

The problem is there is no way to detect it (given it is non-standards-compliant) to switch into a simple-only paste mode. The additional paste code is needed to handle copy-pasting of pills and other rich content in the composer. If you know of a fix, contributions welcome.

[JamesPC44]

What are "pills"?

[t3chguy]

The room link in this message is an example of a [room] pill