Tableau server view url embed y added to end

Question

I'm trying to access a Tableau display, and I'm using simple trusted ticket logic to authenticate the requests over a proxy. When I visit a view, the:embed=y query parameter is added to the view URL, which causes the main menu to vanish.

I'll give you an example of what I'm seeing:

Go to https://tab.apples.com/t/apples/views/SomeView for further information.
The trustworthy ticket is produced from the username URL, which is rewritten to https://tab.apples.com/trusted/ticket/t/apples/views/ in proxy logs.
SomeView
Multiple JavaScript files are downloaded, including angular.min.js, rsa.js, core.min.js, vendors-vizportal.js, vizportal.js, and tableau-2.5.1.min.js.
https://tab.apples.com/t/apples/views/SomeView?:embed=y is requested and loaded by the browser.

I studied up on limited vs. unrestricted tickets and guest users, but I still don't grasp the most of it.

Although my user has restricted access to the programme, I attempted this with an administrator and got the same results.

Do you have any suggestions?