As a result of upgrading to 6.2.4, the following two problems occur in the nested grid.
Are these bugs?
1. Click on the icon to expand the grid and the area from the icon column to the bottom of the nested grid is grayed out.
2. After expanding the grid, click on the column of the parent row, the area from this column to the bottom of the nested grid is grayed out.
These did not occur in version 6.1.0, so please check.