Partial matching when using pn.widgets.MultiChoice

I am trying to use the MultiChoice widget so users can select symptoms they are experiencing. When I was inputting options, I noticed some of the returned options were not as expected according to the inputted text (see example below). I was wondering how the MultiChoice widget matches strings from the inputted options with the text inputted to this widget. I know we can use the search_option_limit so that we can change the max amount of options returned when the user inputs text, but what I am looking for it “true” matches, where the number of these matches changes depending on what the user enters.