diff --git a/.changes/v1.11/BUG FIXES-20250303-144020.yaml b/.changes/v1.11/BUG FIXES-20250303-144020.yaml
new file mode 100644
index 0000000000..0a1be9fa3c
--- /dev/null
+++ b/.changes/v1.11/BUG FIXES-20250303-144020.yaml	
@@ -0,0 +1,5 @@
+kind: BUG FIXES
+body: Combining ephemeral and sensitive marks could fail when serializing planned changes
+time: 2025-03-03T14:40:20.606817-05:00
+custom:
+    Issue: "36619"