--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/test_4505.py	Mon Sep 15 11:44:09 2025 +0200
@@ -0,0 +1,27 @@
+import pymupdf
+import os.path
+
+
+def test_4505():
+    """Copy field flags to Parent widget and all of its kids."""
+    path = os.path.abspath(f"{__file__}/../../tests/resources/test_4505.pdf")
+    doc = pymupdf.open(path)
+    page = doc[0]
+    text1_flags_before = {}
+    text1_flags_after = {}
+    # extract all widgets having the same field name
+    for w in page.widgets():
+        if w.field_name != "text_1":
+            continue
+        text1_flags_before[w.xref] = w.field_flags
+    # expected exiting field flags
+    assert text1_flags_before == {8: 1, 10: 0, 33: 0}
+    w = page.load_widget(8)  # first of these widgets
+    # give all connected widgets that field flags value
+    w.update(sync_flags=True)
+    # confirm that all connected widgets have the same field flags
+    for w in page.widgets():
+        if w.field_name != "text_1":
+            continue
+        text1_flags_after[w.xref] = w.field_flags
+    assert text1_flags_after == {8: 1, 10: 1, 33: 1}