I think a recent update made it so that if you get a text and open it from the notification, then press the back arrow button in the top left corner, it closes Textra. This is inconvenient if, say, you're having more than one conversation at a time, and you respond to one person via the notification. I expect the back arrow button to take me to all of my conversations, but instead it closes the window and I have to open Textra again.

If this is not the desired default behaviour, at least include the option for whether the back arrow closes the conversation window or takes you back to your contacts.