When I try to change my domain MX record, it prompts that This record was generated by Cloudflare. It can be removed by disabling Email Routing on your domain, and when I go to Email > Email Routing > Settings page to disable it, it says Disabling, and it doesn’t work for me to repeatedly click the Disabling button.
I did the same thing for another domain and was go to Unlock records and continue/ Delete and Disable selection page, this one does not.
Sometimes it may caused by a glitch, so I suggest you to clear your browser cache or using a different browser/ incognito mode, before trying to disable it again.
I have tried these operations through different browsers and different network conditions, but this still does not work.
I’m confident that the environment I’m operating in is not the cause of this issue because I can successfully disable my other domains in the same environment.