--- /dev/null
+diff --git a/typo3/sysext/backend/Classes/Form/Container/FlexFormElementContainer.php b/typo3/sysext/backend/Classes/Form/Container/FlexFormElementContainer.php
+index 829c64d..091a03d 100644
+--- a/typo3/sysext/backend/Classes/Form/Container/FlexFormElementContainer.php
++++ b/typo3/sysext/backend/Classes/Form/Container/FlexFormElementContainer.php
+@@ -121,7 +121,14 @@ class FlexFormElementContainer extends AbstractContainer {
+
+ $fakeParameterArray['onFocus'] = $parameterArray['onFocus'];
+ $fakeParameterArray['label'] = $parameterArray['label'];
++ $originalFieldName = $parameterArray['itemFormElName'];
+ $fakeParameterArray['itemFormElName'] = $parameterArray['itemFormElName'] . $flexFormFormPrefix . '[' . $flexFormFieldName . '][' . $lkey . ']';
++ if ($fakeParameterArray['itemFormElName'] !== $originalFieldName) {
++ if (!empty($fakeParameterArray['fieldChangeFunc']['TBE_EDITOR_fieldChanged'])) {
++ $fakeParameterArray['fieldChangeFunc']['TBE_EDITOR_fieldChanged'] = str_replace($originalFieldName, $fakeParameterArray['itemFormElName'], $fakeParameterArray['fieldChangeFunc']['TBE_EDITOR_fieldChanged']);
++ }
++ }
++
+ $fakeParameterArray['itemFormElID'] = $fakeParameterArray['itemFormElName'];
+ if (isset($flexFormRowData[$flexFormFieldName][$lkey])) {
+ $fakeParameterArray['itemFormElValue'] = $flexFormRowData[$flexFormFieldName][$lkey];