Index: openacs-4/packages/xowiki/tcl/form-field-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/xowiki/tcl/form-field-procs.tcl,v
diff -u -r1.284.2.252 -r1.284.2.253
--- openacs-4/packages/xowiki/tcl/form-field-procs.tcl	21 Jun 2024 09:35:54 -0000	1.284.2.252
+++ openacs-4/packages/xowiki/tcl/form-field-procs.tcl	21 Jun 2024 10:47:34 -0000	1.284.2.253
@@ -4252,12 +4252,12 @@
               const repeatSelector = `[id^='${containerId}']`;
               const compoundRepeatSelector = `[data-repeat-template-id='${id}']`
               const targetNode = document.getElementById(containerId);
-              const config = { childList: true };
+              const config = { childList: true, subtree: true };
               const callback = (mutationList, observer) => {
                 for (const mutation of mutationList) {
                   for (const repeatedField of mutation.addedNodes) {
-                    const inputField = repeatedField.querySelector(compoundRepeatSelector) ||
-                                       repeatedField.querySelector(repeatSelector);
+                    const inputField = repeatedField.querySelector?.(compoundRepeatSelector) ||
+                                       repeatedField.querySelector?.(repeatSelector);
                     if (!inputField) { continue; }
                     const fieldId = inputField.id;
                     const repeatInfo = JSON.parse(repeatedField.getAttribute('data-repeat'));