At least two operations which one would expect to be performed with an open message are instead performed with the one focused in the message list.

#reply -c

1. Open a message.
2. Issue :reply -c on the open message.
3. Switch back to the message list of the same account.
4. Focus a different message.
5. Return to the reply composer and abort.
6. The newly focused message is re-opened instead of the one we were replying to.

#next-message

1. Open a message.
2. Switch back to the message list of the same account.
3. Focus a different message.
4. Return to the open message tab.
5. Issue :next-message or :prev-message.
6. Next/previous message is opened with respect to the newly focused one instead of the open one.