BufferedRenderer: White space at the top of the screen and Invalid row count rendered

[Ramesh Manne]

Ext version tested:
Ext 5.1.2
Ext 5.1.1

Browser versions tested against:
Chrome: 51.0.2704.103

DOCTYPE tested against:
Strict

Description:
White space will be displayed at the top of the page on scroll down (either to the bottom of the records list or one page down) of the Grid and then refresh the view of the Grid with Buffered rendering enabled.

Rows of the grid will be rendered back on scrolling up and down couple of times.

Steps to reproduce the problem:
- Scroll down (either to the bottom of the grid or may be one page level down).
- Refresh the view (Click the button => Refresh View)

The result that was expected:
Rows should re-render back on scroll up.

The result that occurs instead:
White space at the top of the Grid

Fiddle: https://fiddle.sencha.com/#fiddle/1ctd

[Gary Schlosberg]

Thanks for the report! I have opened a bug in our bug tracker.

[guilherme.lopes]

Refresh shouldnt be manually called while using bufferedRenderer.
If you absolutely must refresh the view, use the refreshView() method.

grid.getView().refreshView();