fix(core/forms): set null value for calculate fields if value is equals to NaN

Author: sara-re

projects/core/forms/src/utils/fields-instances/update-formula.ts

@@ -48,11 +48,17 @@ export function updateFormula(
   if (instance.visible) {
     if (formula != null && (!editable || (editable && instance.value == null))) {
       newValue = evaluateExpression(formula.formula, context);
+      if (Number.isNaN(newValue)) {
+        newValue = null;
+      }
       changed = true;
     } else if (updateDefault && instance.node.defaultValue != null && instance.value == null) {
       changed = true;
       if (instance.node.defaultValue.formula != null) {
         newValue = evaluateExpression(instance.node.defaultValue.formula, context);
+        if (Number.isNaN(newValue)) {
+          newValue = null;
+        }
       } else {
         newValue = instance.node.defaultValue;
       }