How to Traverse a Score in Reverse When No Selection Is Made?

I'm working on a MuseScore plugin where I need to reverse traverse a score, starting from the last tick. However, I've encountered an issue where, if no selection is made, calling cursor.rewind(2) resets the cursor.tick value to 0 instead of positioning the cursor at the end of the score. Additionally, using cursor.prev() doesn't seem to correctly move the cursor to the previous segment when trying to traverse backward from the end.

Here's my simplified code that demonstrates the problem:

import QtQuick 2.2
import QtQuick.Controls 2.0
import MuseScore 3.0

MuseScore {
version: "3.4.2.1"
description: qsTr("Reverse Traverse Score")
menuPath: "Plugins.Reverse Traverse"

function reverseTraverseScore() {
    var cursor = curScore.newCursor();
    cursor.rewind(2);  // Attempt to move the cursor to the end of the score

    if (cursor.tick === 0) {
        // Cursor failed to move to the end of the score
        console.error("Failed to move cursor to the end of the score.");
        return;
    }

    // Reverse traversal from the end of the score
    while (cursor.tick > 0) {
        console.log("Current tick: " + cursor.tick);
        cursor.prev();  // Attempt to move to the previous segment
    }
}

onRun: {
    reverseTraverseScore();
}

}