Wordpress administration broken (even on fresh installs)

[boutzamat]

Hello there. Thought a client was having a error and that it was caused by a plugin but it wasnt.. I tried disabling ALL plugins and themes reverting to default, and still the administration menu is broken (links are out of place and design is messed up)...

I therefore tried creating a fresh installation on another server - but the same happens..

I have tried toggling off JS in my browser (Chrome) with a smart JS toggle tool, and the administation page looks perfect again..

I see the administation menu is depending on JS, since the flyout menus gets a new class on hover - maybe that is why its bugged..

Anyway, it works perfect with JS disabled.. Thought i'd let you know.

[boutzamat]

screenshot

[swissspidy]

Duplicate of #33199.