Email alert message...disappeared in setup

in Email Alert setup…message text is disappeared. i have enter in past time the custom text with variable…but now isn’t visible.

ERPNext: v7.1.1

Frappe Framework: v7.1.2

email arrived is correct

this the source code of page

Raised a PR for 7.1.x https://github.com/frappe/frappe/pull/2250

Thanks Rmehta,
i did bench update

in addition I had to remove is_standard in Depends On in
Email Alert -> Customize -> Message

It works
Thank you very much