How to avoid output into scrollable frames in jupyter notebook?

I stumbled across the same problem, a scrollbar appeared for outputs out of nowhere.

Just go to- Cell > All Outputs > Toggle Scrolling (On the Menu Bar) and outputs will go back to no scrolling.

You can just use mouse to click on the outside of the output Frame to toggle between scrolling, it worked for me. More precisely, you have to click the square to the left of your output (see image).

Single click will toggle scroll mode, double click will hide output completely.

To disable auto-scrolling, execute this javascript in a notebook cell before other cells are executed:

%%javascript
IPython.OutputArea.prototype._should_scroll = function(lines) {
    return false;
}

There is also a jupyter notebook extension, autoscroll, you can use for a nicer UI.