Explain descendants removed by sequence replacement

internal/engine/history.go

@@ -139,7 +139,15 @@ func applicationOperationPath(application historyApplication, query Path, lookup
 		}
 		sequencePathMatched = true
 		if pathContains(container, query) && len(query.segments) > len(container.segments) {
-			if _, ok := historyApplicationLocalPath(application, query); !ok {
+			local, ok := historyApplicationLocalPath(application, query)
+			if contribution.mode == sequenceHistoryReplace {
+				if _, present := documentAtPathWithLookup(application.value, local, lookup); !ok || !present {
+					// A replacement also changes descendants missing from the
+					// incoming list. Attribute their removal to its container.
+					return container, true
+				}
+			}
+			if !ok {
 				continue
 			}
 		}