Also, have you tried putting the apple-mobile-web-app-title meta tag before any other meta tags in case some of the other Apple meta tags are crashing the Apple meta tag reader?E.g. https://stackoverflow.com/questions/41686471/my-iphone-says-my-web-app-is-untitled-when-it-is

It used to work. I think on ios 12 and maybe 13.x. I just saw Untitled for the first time today though I hadn’t tested it for a few months. Maybe a recently introduced bug by the Safari team? Did you log a bug?