ui grid menu bugs (more than 15 column)

there is bugs with grid menu when there is too many column and you have to horizontally scroll. After horizontally scrolling to the last column, if you click on hide column, after clicking just one column, option to click other will fade and then again have to click on grid menu to hide other column. Instead of clicking multiple hide column at the same time, it only allows to click one at a time then have to click on grid menu again and click others. But after hiding, we can click multiple show columns at the same time.