why its not working here?

Please help what's wrong? The code is working fine with example tests but while checking the code it fails. Below is my code..

let arr=text.split(' ');
  let counter=0;
  for(let i=0;i<arr.length;i++){
     if(isNaN(arr[i])){
       counter++;
       if(counter===3){
         return true
       }
     }
     else {
       counter=0;
     }
  }
  return false;

Wrapped in function..