fix

Author: dummdidumm

packages/svelte/src/internal/client/dom/elements/bindings/select.js

@@ -89,7 +89,10 @@ export function bind_select_value(select, get, set = get) {
 			value = [].map.call(select.querySelectorAll(query), get_option_value);
 		} else {
 			/** @type {HTMLOptionElement | null} */
-			var selected_option = select.querySelector(query);
+			var selected_option =
+				select.querySelector(query) ??
+				// will fall back to first non-disabled option if no option is selected
+				select.querySelector('option:not([disabled])');
 			value = selected_option && get_option_value(selected_option);
 		}