Hello,

Version: Ext JS 6.5.0.775 - Triton

OS: Windows

Browser tested: Chrome 58.0.3029.110 (64-bit)

Toolkit: Classic

Description: error when the last focused element was the scrollbar of the gird.

Fiddle: https://fiddle.sencha.com/#view/editor&fiddle/20v2

Scenario: Scroll to the right in the grid then click below the record, see console for error

In 6.2.1 it works fine