Read receipts don't come down to the latest message in the room

[babolivier]

As you can see, the message is read (send status disappears) but the RR doesn't come down - it only does when I switch rooms (I switched to my DM with @benparsons and back hence why his RR briefly appears at the end). I control both accounts involved in the DM I'm doing tests in so can confirm the message isn't read while switching rooms.

Using develop.element.io with Firefox 85.0, and have sent logs.

[turt2live]

@babolivier was the message edited?

[babolivier]

@turt2live No

[turt2live]

I need a bunch of other information then, as I cannot reproduce this.

• Who was the sender of the message? (you or someone else?)
• What operating system are you using?
• Do you have reduced motion enabled in your OS or browser?

[babolivier]

Who was the sender of the message? (you or someone else?)

Me.

What operating system are you using?

This was develop.element.io with Firefox 85.0 on ArchLinux.

Do you have reduced motion enabled in your OS or browser?

I haven't purposefully enabled it and am not sure how to check what state it's in.

[turt2live]

is that a fork of firefox or regular off-the-shelf firefox?

[turt2live]

also which desktop environment are you using?

[babolivier]

is that a fork of firefox or regular off-the-shelf firefox?

Regular off-the-shelf (pacman -S firefox) firefox

also which desktop environment are you using?

Gnome version 3.38.3

[turt2live]

alright, I'm suspecting this has something to do with your OS rather than Element/Firefox

[babolivier]

Hmm, any idea how to debug this? It's a pretty standard setup (without much customisation) so I'm a bit surprised to hear that.

[turt2live]

Honestly not sure. I can't get an arch VM going to test myself, but all other testing points to it being a problem with your setup specifically :(

If you have another device to test with, I'd try that and see what happens.

[turt2live]

@babolivier has this been better on updated versions of develop?

[babolivier]

Not as far as I can tell.

[turt2live]

ugh, this is going to be not very fun to diagnose

[shmerl]

I have the same issue.

Debian testing Linux, Firefox 87.0.

I wonder how can it be OS related? It should be purely browser driven issue? Is it working OK for Firefox users on Windows let's say?

Also, I had "Enhanced tracking protection" on in Firefox. I disabled it for now for Element to see if it has any effect.

[turt2live]

It's working fine for me in Firefox on Linux and Windows, which is part of the problem.

[shmerl]

When looking in console, I see some messages like:

Error: request failed: CORS request rejected: https://matrix-client.matrix.org/_matrix/client/r0/sync...

Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://matrix-client.matrix.org/_matrix/media/... (Reason: CORS header ‘Access-Control-Allow-Origin’ missing).

And

Content Security Policy: The page’s settings blocked the loading of a resource at inline (“script-src”).

Content Security Policy: The page’s settings blocked the loading of a resource at blob:https://app.element.io/...

Not sure if any of that is related to the above, but just noting the errors.

[shmerl]

It seems to be working better with tracking protection turned off. I'll keep monitoring it.

[turt2live]

is anyone still seeing this in recent versions of develop?

[babolivier]

Yeah I can still see it on develop.element.io

[turt2live]

ugh, that's annoying. Any chance of trying other browsers/desktop environments to see if it fixes itself? or trying the desktop app?

[babolivier]

Sure, I'll give that a try next week.

[babolivier]

I've had a try in Chrome 89.0.4389.90 (still on Gnome because I've only got this DE set up), I couldn't reproduce this specific issue and could see the animation when a RR goes down (which I don't see on Firefox), but I could also see RRs stacking on top of each other and holes (e.g. or ).

[babolivier]

I've just had a try in Firefox after manually disabling tracking protection and it seems to now match what I'm seeing in Chrome. nvm I can still reproduce what I was seeing initially, just that now there's an animation when a RR goes down

[turt2live]

that's at least progress - so disabling tracking protection (either by using chrome or within firefox) is at least giving you animations? If so, the holes might be a different animation issue or the media repo being slow - if you hover hover a where an avatar would be, do you get a cursor change and tooltip of a user ID? If not, boo. If yes, it's just the media repo at that point.

[babolivier]

so disabling tracking protection (either by using chrome or within firefox) is at least giving you animations?

Yes looks like it.

if you hover hover a where an avatar would be, do you get a cursor change and tooltip of a user ID?

Nope :/

[turt2live]

The next step on this is #16554 ftr

[babolivier]

Can confirm that matrix-org/matrix-react-sdk#5836 fixes all issues with read receipts from my pov 👍