Using chrome on windows. See screenshot:
Spoiler
(https://i.imgur.com/phZZo7y.png)
EDIT: Aaaaand... you fixed it. :)
That happened because your browser cached the old css file from before the update. You were waiting ;)
I had that happen to me and I was like *noooo* what happened to my site?! Then I just did a full refresh and everything looked normal.