diff --git a/packages/server/src/utils/index.ts b/packages/server/src/utils/index.ts
index ed9ec8708be..0b5e89b2e28 100644
--- a/packages/server/src/utils/index.ts
+++ b/packages/server/src/utils/index.ts
@@ -777,14 +777,15 @@ export const getVariableValue = async (
     flowData?: ICommonObject
 ) => {
     const isObject = typeof paramValue === 'object'
-    let returnVal = (isObject ? JSON.stringify(paramValue) : paramValue) ?? ''
+    const initialValue = (isObject ? JSON.stringify(paramValue) : paramValue) ?? ''
+    let returnVal = initialValue
     const variableStack = []
     const variableDict = {} as IVariableDict
     let startIdx = 0
-    const endIdx = returnVal.length - 1
+    const endIdx = initialValue.length - 1
 
     while (startIdx < endIdx) {
-        const substr = returnVal.substring(startIdx, startIdx + 2)
+        const substr = initialValue.substring(startIdx, startIdx + 2)
 
         // Store the opening double curly bracket
         if (substr === '{{') {
@@ -795,7 +796,7 @@ export const getVariableValue = async (
         if (substr === '}}' && variableStack.length > 0 && variableStack[variableStack.length - 1].substr === '{{') {
             const variableStartIdx = variableStack[variableStack.length - 1].startIdx
             const variableEndIdx = startIdx
-            const variableFullPath = returnVal.substring(variableStartIdx, variableEndIdx)
+            const variableFullPath = initialValue.substring(variableStartIdx, variableEndIdx)
 
             /**
              * Apply string transformation to convert special chars: