I'm submitting a bug report

Current behavior

In a Native Grid that has a multicolumn header which is locked, when the Grid is scrolled horizontally, the upper(shared) part of the multicolumn header is moving based on the scrolling direction.

Expected behavior

When the multicolumn header is locked it should not move along with the horizontal scrolling inside the Grid

Minimal reproduction of the problem with instructions

1. Open this example
2. Scroll the Grid horizontally