When the filterable mode is enabled in the Grid and the user has to scroll to the needed column, then the Column Menu autocloses right after a column is selected or deselected in the column list in the ColumnMenu. The issue appears only with 'classic' mode.
The ColumnMenu immediately closes. The ColumnMenu does not close when it is used for the initially visible columns.
The ColumnMenu should not close. The behavior should be consistent for all the columns.