On connect queued messages are sent before attaching channels

[davyskiba]

When a connection enters the connected state, queued messages are sent first, and channels are attached afterward. This behavior matches the in ConnectionManager.. It can lead to unexpected exceptions i.e. when queued presence leave message is sent before channel reattach like documented in this AAT issue.

[sync-by-unito]

➤ Automation for Jira commented:

The link to the corresponding Jira issue is https://ably.atlassian.net/browse/SDK-3269

[paddybyers]

There should only be queued messages for channels that were attached at the time they were sent.

If it's a reconnection that's a failed resume, then channels should be reattached before queued messages are sent.

[ikbalkaya]

@davyskiba Is it easy to replicate this in AAT repo 🤔 I'd like to test this against some changes I made recently.

[ikbalkaya]

So I had a run with the test locally against ably-java version with changes done #900
the test passes and it fixes this issue. After confirmed collectively, we should close this issue