Enabling the noCaret option on the dropdown or nav-item-dropdown component causes some unwanted styling issues due to dropping the .dropdown-toggle class.

Bootstrap uses this class for some minor styling changes for dropdowns in button-groups, input-groups and even the button itself.

A better solution would be to add a custom class like .dropdown-toggle-no-caret to the dropdown-toggle when the noCaret option is set and use some custom CSS to hide the caret.