Conditional show hide editor fields works but fails after many clicks on other lines

I have an Editor form with a.o. fields for alternative delivery address. If the "montering_alt" field is "1" there is also a "montering_adr" so I want to hide the fields if the first field is not "1". I also want the same for the field "reg_std" , show it only if its value is "1".

editor = new $.fn.dataTable.Editor( { ...........

fields: [
           {
                label: "Alt. monteringsadr.",
                name: "montering_alt",
                type: "hidden"
            }, {
                label: "Monteringsadresse",
                name: "montering_adr"
            }, {
                label: "Standard montering:",
                name: "reg_std",
                type:  "radio",
                options: [
                    { label: "Nei", value: 0 },
                    { label: "Ja",  value: 1 }
                ],
                def: 0
            }
            ]

Function to check when editing to hide the fields if they are not "1"

editor.on( 'initEdit', function () {
   if (editor.val( 'reg_std' ) != 1) {editor.hide( 'reg_std' );} 
   mont_alt = editor.val( 'montering_alt' );
    if(mont_alt != 1)
    {
        editor.hide( 'montering_adr' );
        editor.hide( 'montering_postnr' );
    }
  } );

The problem is that the first time I click on a row, the logic works. I can log to console and the value is "1". I see the field "montering_adr". The next row does not have value "1" so the field is hidden. After clicking several records I go back to the first record and the field "montering_adr" is hidden now. But in console the value is "1" (it should show). I tried to redraw the table after each edit but the conditional does not kick in before I refresh the page again. Anyone see why the conditional does not work after at time?