If I create a report with a report parameter whose value is initially False, and then load it in the Native Angular Report Viewer, it is initially loaded properly.

However, if I click the "Preview" button, and the parameter is still unchecked(false), I get an error that the value is invalid.

The issue does not reproduce if the report parameter has AutoRefresh=True and there is no "Preview" button. I can successfully change the value of the parameter and the report loads without errors.