Mobile theme

Can you please share the website URL with us? So we can analyze it and help you to fix the issue for you.

Sure, its https://communityonfriday.net/

We checked your issue.
1. Can you please tell me are you enable mobile redirection option on AMP?
AMP option panel -> Click on Settings -> Advance Settings -> Mobile Redirection
please follow this tutorial: https://ampforwp.com/tutorials/article/how-to-redirect-all-mobile-visitors-to-amp/

2. Can you please tell me are you using the WPTouch plugin? If you are using, please
deactivate it.

3. Please share the numbered list of active plugins that using on your AMP pages? You can share the plugin list in https://pastebin.com/

Thanks for your help, it seemed to be the WP Touch plugin that was the issue

Please deactivate it and check once then let me know if the issue has been fixed or not.

Yes it did work, thanks!