DeleteMessage from SingleMessageViewer does not refocus on a message in the MainViewer

I'm pretty sure that it's not my configuration, because I've checked this multiple ways, but I could be wrong.

When I delete a message (pressing 'D') while viewing a message in the SingleMessageViewer, I'd like MailMate to refocus on the previously focused MultiMessageViewer and have the 'Current Message Cursor' be on either the next or previous message. It doesn't seem to work that way for me.

Am I missing something?

Expected/Desired Behavior

• From a main window, open a message in a single-message viewer.
• Press '^h' to execute "deleteMessage:"
• MM deletes the message and then closes the single-message viewer window.
• The main window should either advance to the next, previous, or unread message, depending upon the setting of MmMessagesOutlineMoveStrategy, either {none, next, previous, unreadOrNext, unreadOrPrevious}.

Observed Behavior

• As above, except in step #5, MM always behaves as if "none" were the value of the key "MmMessagesOutlineMoveStrategy".

Relevant Config Snippets:

    # Check to see what the key for the hidden pref documented
    # at this page: https://manual.mailmate-app.com/hidden_preferences
    $ defaults read com.freron.MailMate MmMessagesOutlineMoveStrategy
    next
    $

    # Check to see what the key-binding is for ^h...
    $ fgrep deleteMessage: "/Users/petonic/Library/Application Support/MailMate/Resources/KeyBindings/Petonic.plist"
        "^h" = "deleteMessage:";

Is more config info required?

Thanks in advance!