Contact Form 7 is breaking Page Editor again

Below is the error message I get when I try to edit the page containing the contact form when the plugin is activated. If I deactivate the plugin I can edit the page and then reactivate the plugin. I notice that this problem was a topic in 2022 but doesn’t seem to have been resolved.

Running WordPress 6.5.3 and Contact Form 7 version 5.9.4

TypeError: Cannot read properties of undefined (reading ‘join’)
at https://westmoraychurchofscotland.org.uk/wp-includes/js/dist/editor.min.js?ver=6497dd814badef65e728:12:120617
at https://westmoraychurchofscotland.org.uk/wp-includes/js/dist/data.min.js?ver=e6595ba1a7cd34429f66:9:2061
at __unstableMarkListeningStores (https://westmoraychurchofscotland.org.uk/wp-includes/js/dist/data.min.js?ver=e6595ba1a7cd34429f66:2:21866)
at Object.__unstableMarkListeningStores (https://westmoraychurchofscotland.org.uk/wp-includes/js/dist/data.min.js?ver=e6595ba1a7cd34429f66:2:22124)
at p (https://westmoraychurchofscotland.org.uk/wp-includes/js/dist/data.min.js?ver=e6595ba1a7cd34429f66:9:2026)
at https://westmoraychurchofscotland.org.uk/wp-includes/js/dist/data.min.js?ver=e6595ba1a7cd34429f66:9:2628
at Qe (https://westmoraychurchofscotland.org.uk/wp-includes/js/dist/data.min.js?ver=e6595ba1a7cd34429f66:9:2840)
at Ye (https://westmoraychurchofscotland.org.uk/wp-includes/js/dist/data.min.js?ver=e6595ba1a7cd34429f66:9:3157)
at ia (https://westmoraychurchofscotland.org.uk/wp-includes/js/dist/editor.min.js?ver=6497dd814badef65e728:12:120424)
at wt (https://westmoraychurchofscotland.org.uk/wp-includes/js/dist/vendor/react-dom.min.js?ver=18.2.0:10:47637)

The page I need help with: [log in to see the link]