Threads Combining Unrelated Emails Together

Mailspring is lumping together unrelated emails into threads. Emails with the same subject but unrelated. I don’t want this behaviour. I’ve looked through the settings, and I cannot find a way to disable the thread feature.

Please advise how I can disable the thread feature or alternatively, if there is no setting to turn this off, please add a setting to disable it.

Thanks for considering my suggestion,

Julian