Minor issue. The bookmark feature in pages typically shows a little excerpt of whatever is linked. However, for Twitter, it displays: “This browser is no longer supported. Please switch to a supported browser to continue using twitter.com […]”.
It appears that every “twitter.com” and “mobile.twitter.com” site will fail to embed, with the error message "Something went wrong, but don’t fret – let’s give it another shot. Profile pages, Tweets, and the root website itself are all affected. Twitter subdomains, such as “help.twitter.com” do succeed. Other applications that parse webpage titles, descriptions and images, such as Discord and Telegram, succeed in displaying the information.
This issue also occurs on the mobile iOS and Android apps - the preview and Twitter error message doesn’t load and will only display the raw URL itself.
This is absolutely not a significant issue, but being able to preview the Tweet within a Bookmark block is useful for understanding the content of a Tweet at a glance, without opening it.