diff --git a/lib/data/ddata.js b/lib/data/ddata.js
index 9389f10d360..caab8e04139 100644
--- a/lib/data/ddata.js
+++ b/lib/data/ddata.js
@@ -265,7 +265,11 @@ function init () {
     ddata.tempbasalTreatments = ddata.processDurations(tempbasalTreatments, false);
 
     // filter temp target
-    var tempTargetTreatments = ddata.treatments.filter(function filterTargets (t) {
+    var tempTargetTreatments = ddata.treatments.filter(function filterTargets (tt) {
+
+      // Clone the treatment before modifying it
+      let t = _.cloneDeep(tt);
+
       //check for a units being sent
       if (t.units) {
         if (t.units == 'mmol') {