Missing events received before accepting room invite

[germain-gg]

Steps to reproduce

1. Alice creates an e2ee room
2. Alice sends three messages
3. Bob accepts the invite
4. Alice sends another message

Outcome

What did you expect?

For Bob to see four messages

What happened instead?

Bob only saw the last message that Alice sent, the one sent after he accepted the room invite

Your phone model

iPhone 13

Operating system version

iOS 16

Application version

1.1.6 (267)

Homeserver

matrix.org

Will you send logs?

Yes

[pixlwave]

Issue for this is in the SDK here: https://github.com/matrix-org/matrix-rust-sdk/issues/2302

[ara4n]

this just bit me really badly; it's a horrible flaky bug.

[ara4n]

worse, it looks like everything you then send into the newly joined room is UTD

[ara4n]

To add insult to injury, it briefly flashes up the messages in the timeline before then hiding them again on accepting an invite. There's also some other pattern happening where they sometimes reappear on launch, but sometimes don't.

[Hywan]

Just tested and things are fixed.

[ara4n]

unsure - just saw a report of this in the wild:

[9p4]

I'm the user in the screenshot above.

• iOS 17.5 (iPhone 13 Mini)
• Element X iOS 1.6.7

Let me know if you need any more information.

[Hywan]

Just tested again and it works:

• mnt_io_test creates the e2ee room
• mnt_io_test sends 3 messages: “a”, “b” and “c”
• mnt_io accepts the invitation
• mnt_io sees the 3 messages from mnt_io_test

Screenshot from mnt_io point of view:

Tested with Element X iOS 1.6.8 (601). If it doesn't work, I would suspect the proxy to have some lags or something like that.

[stefanceriu]

Ivan is right, this is no longer an issue.

[ara4n]

i am very sure this is still an issue - i saw it happen on amandine's account last week. we just don't have the right repro steps yet. let's continue this at https://github.com/element-hq/element-x-ios/issues/2024