Dataset filter stopped working

I have a membership profile page that uses a dataset to drive a repeater. I created this a year ago and it has been working perfectly until maybe a month ago. I have two controls above the repeater: one filters the dataset by location, and another one is a text field that allows the user to enter any part of a profile’s name, and it will filter the dataset to show only those records whose name field contains the text that they entered.
This has worked on-line perfectly for a year, but now the text search filter does not work. Nothing has changed in the code. And, by the way, it works perfectly in the preview mode. Did something change in Velo that might have broken my code?

Here is my code:
import wixLocation from ‘wix-location’ ;

        // API Reference: https://www.wix.com/corvid/reference 
        import  wixData  from  "wix-data" ; 
        $w . onReady ( () => { 
            $w ( "#readmorebutton" ). target  =  "_self" ;   //forces the ReadMore button to open in this tab 
        $w ( "#ICMembers" ). onReady ( () => { 
            let  count  =  $w ( "#ICMembers" ). getTotalCount (); 
            console . log ( count ); 
            $w ( "#text76" ). text  =  count . toLocaleString ( 'en' ); 
        $w ( "#button1" ). onClick ( ( event ) => { 
        wixLocation . to ( wixLocation . url );  // refresh current page 
        } );     
        } ); 
        } ); 

        export function  searchbutton1_click_1 ( event ) { 
            $w ( "#ICMembers" ). setFilter ( wixData . filter () 
                . contains ( "title" ,  $w ( "#searchfield1" ). value )); 
                //$w('#ICMembers').setFilter(Wixdata) 
        } 

        $w ( "#repeater1" ). onItemReady ( ( $item ,  itemData ,  index ) => { 
            let  count  =  $w ( "#ICMembers" ). getTotalCount () 
            console . log ( count ); 
            $w ( "#text76" ). text  =  count . toLocaleString ( 'en' ); 

        }); 

        export function  ICMembers_currentIndexChanged () { 
            let  count  =  $w ( "#ICMembers" ). getTotalCount () 
            console . log ( count ); 
            $w ( "#text76" ). text  =  count . toLocaleString ( 'en' ); 
        } 

export function button1_click ( event ) {
//reload the page
$w ( “#ICMembers” ). refresh ()
}