Cause: When Pre-order Now is included in the theme, the JS code that controls the dropdown / mobile menu in Venture theme's theme.js file runs before the page is fully loaded. This breaks the menu.

Solution: Put the contents of Venture theme's theme.js file in a jQuery ready block so it runs only once the page is loaded.

Example:

$( document ).ready(function() {//theme.js code goes in here
});

Steps to implement the solution:

1. Navigate to Sales Channel -> Online Store -> Themes.

2. Click on the three dots for the desired theme.

3. Select "Edit Code."

4. Expand the "Asset" folder then click the theme.js.

5. Insert the code "$( document ).ready(function() {" before the /* ================ SLATE ================ */

6. Scroll to the bottom of the file.

7. Add the code "});" after the line "$(theme.init);"

8. Click the 'Save' button to apply the changes.