diff --git a/public/js/src/module/calculate.js b/public/js/src/module/calculate.js
index 2b8de62b..6c918a79 100644
--- a/public/js/src/module/calculate.js
+++ b/public/js/src/module/calculate.js
@@ -14,6 +14,15 @@ calculationModule._updateCalc = function (control, props, emptyNonRelevant) {
         !control.matches('[readonly]')
     );
 
+    if (emptyNonRelevant) {
+        // We're temporarily disabling this cache because it is causing this bug
+        // https://github.com/OpenClinica/enketo-express-oc/issues/730
+        // which we don't quite understand yet, but need to fix urgently.
+        // A proper fix would have to be created in enketo/enketo after which we should remove this clause
+        // (and improve performance).
+        this.preInitRelevance = new WeakMap();
+    }
+
     return this._originalUpdateCalc(control, props, emptyNonRelevant);
 };