Is Figma UI changing?

Hey guys,

Yesterday the UI was completely changed. The options to create a component or mask were appearing above the  floating toolbar, the square of the FILL and STROKE were bigger, I remember seeing some sliders for opacity and something else, I think corner radius or whatever. Today these changes are gone.

What in the world is going on? Are these bugs? Are you releasing things and then unreleasing things? I’m confused...