Broken threading after replying from Firefox

[sosnovsky]

Bug needs investigation:

1. I received message from User 1 addressed to me and another recipient User 2
2. I wrote reply and sent it with reply-all
3. Reply message is rendered in the same thread for me, but for User 1 and User 2 it created new thread
4. Next replies are rendered in the same thread, so only first one caused creating new thread

It's not clear why it happened, can be missing msgId or something else, so needs finding way to reproduce this bug.

[tomholub]

@martgil could you please see if you manage to somehow reproduce this issue? You'll need two different accounts

[tomholub]

This was observed for at least some of us on thread Re: Roman's email address question

[martgil]

@martgil could you please see if you manage to somehow reproduce this issue? You'll need two different accounts

Yes, Tom. Will do -- I will provide all the information once I have the result. I'll follow up here if I may have questions of any sort. thank you.

[martgil]

@sosnovsky I reviewed this bug report and unfortunately, I'm unable to replicate it as I get the expected result. In details, I reviewed the as User 3 (first-person perspective) as well as the User 2 (third-person perspective). In addition to this, we haven't received any bug reports via email.

User 3's perspective on Firefox:

User 2's perspective also on Firefox:

I only had to remove some emails from the screenshots.

[sosnovsky]

@martgil looks like this bug is quite random - I haven't found exact way of reproducing it, but it happened for me again a couple days ago. Also new thread was created for me, while in original description new thread was created for message recipients. I'll recheck message data for broken thread, trying to find what's wrong with it

[martgil]

Thanks @sosnovsky - Is there any chance that you have seen this bug when you are using a Google Chrome browser?