I don’t know why or how, but the menu is now working.
This does seem to be related to version 6.5.2 somehow, as if I view the code via:
view-source:https://www.mustangbooks.com/wp-includes/blocks/navigation/view.min.js?ver=6.5.2
..I see the corruption at the end of the file, but if I view via:
view-source:https://www.mustangbooks.com/wp-includes/blocks/navigation/view.min.js?ver=6.5.0
…then the source code looks fine. Does anyone have any idea how I can fix this? The version on the server looks good to me so I’m not sure where the corrupt file is being served from?