The histogram is not working correctly

I am new to Palantir. I have an existing Workshop app. In this app, histograms are used as a filter option. As far as I know, histograms are suitable for selecting multiple elements; you just need to press the “CTRL” key and click on all the elements. When I open my app anew, I can select multiple elements in my filter. However, once I delete the filter setting, I can only select one element, even though I am holding down the “CTRL” key. Am I doing something wrong?