Panels as Explorer has a minimum size limit?

I dont know if this post should be in Studio Features Requests or Studio Bugsā€¦ (?)
Its not a request cause the feature was released, I dont know if its a bug or its disabled and I should turn it on or its removed.

A few days ago after a Studio Update, the size of the windows (Explorer, Output, etc) were able to be smaller when dragging the border of the window, being able to shrink the panels to a very small size (which I was so happy with)
Seems it got removed or I should enable it?
As before, now I cant make the panels smaller, like having a minimum size limit, or its just me?