Hello, I found a problem with Table/TreePanel scrolling and bufferedRenderer.

Extjs version: nightly build - 20141113

Browser: Chrome / Webkit

OS: MacOS 10.8.5

How to reproduce:

• Create a treepanel with a lot (enough to scroll 2/3 times the visible space) of records so that BufferedRenderer will work with rendering.

• Scroll down to let the BufferedRenderer render the next bunch of records

• Reload the store of treepanel (here is the problem)


When you try to reload you'll see a white space/offset where before you could see the treepanel records and it's impossible to see the rows.

You can see all the rows only if you scroll again down (below the white space/offset).


The workaround:

setting bufferedRenderer = false to the treepanel, the scrolling will be faster and reloading the store, all the records will be there correctly.