diff --git a/src/isolator/hei_isolator.cpp b/src/isolator/hei_isolator.cpp
index 3f75163..404a367 100644
--- a/src/isolator/hei_isolator.cpp
+++ b/src/isolator/hei_isolator.cpp
@@ -55,7 +55,7 @@
     ReturnCode rc;
 
     // Flush the isolation data to ensure a clean slate.
-    o_isoData.clear();
+    o_isoData.flush();
 
     // Flush the hardware register cache to avoid using stale data.
     HardwareRegister::flushAll();