Dropdown label does not clear after when filter is reset

Short question as I have been stuck with a small but annoying problem.

I have various filters (via dropdowns) which run queries in my database. When a filter selection returns zero results, a pop up window appears and the last selected filter is cleared. All this works fine, the issue is only when I reclick on the last selected filter, the option which I have previously selected is still shown. Any idea of how I can fully clear the dropdown, incl. the label. A photo and a small snipplet of my current code below. Many thanks for your support

wixWindow.openLightbox(“NoAvailability5”).then(() => {
if (lastSelectedFilter) {
// Reset the dropdown by clearing the selection
$w(lastSelectedFilter).value = null; // Clear the selected value
$w(lastSelectedFilter).resetValidityIndication(); // Clear any red frame
}

maybe this can help

import wixWindow from 'wix-window';

wixWindow.openLightbox("NoAvailability5").then(() => {
    if (lastSelectedFilter) {
        $w(lastSelectedFilter).value = null; 
        $w(lastSelectedFilter).resetValidityIndication();

        // Optionally, you can also reset other UI aspects if needed
        $w(lastSelectedFilter).placeholder = "Select an option"; // Set to default placeholder text if needed
    }
});