Conversation View not working for one folder

[R Skarbø]

I have a Gmail account set up in Postbox 4.0.3. Conversation view is not working for my "Archive" folder. It works well with my other folders, such as "Inbox" and "Sent mail". 

Working in "Sent mail", including both sent messages and messages in "Archive":

Same conversation in "Archive", not grouping in conversation view and not including the sent messages in "Sent mail":

I have tried the steps as described in the troubleshooting guide "Messages from other folders are not included in Conversation View", including restarting the program, but with no luck. It worked perfectly until I adjusted settings for which folders to show in Gmail IMAP.  

Has anyone experienced the same problem?

[R Skarbø]

The issue seems resolved, and I believe it happened "by accident". What I did was change only the one setting

From this:

To this:

Even though the other folders are set up the same way as the first setting, they don't seem to experience any problems. 

So there you go. Hope this can resolve the issue if someone else is experiencing the same.