How can I reference an event properties value (OrderId) in the conditional split of a metric based flow?

Hi,

I want to create a flow based on an event called “Preorder”, for example:

{
  "token" : "xxxx",
  "event" : "Preorder",
  "customer_properties" : {
    "$email" : "email@gmail.com"
  },
  "properties" : {
    "OrderId" : "12345",
    "PaymentLink" : "https://gmail.com/"
  } 
}

I want to exclude customers from receiving following emails in this flow if the customer profile had a property called PaidOrders and this property contains the order ID coming from the trigger event:

PaidOrders: ["12345", "abcdef"]

This is how my flow look like:

The conditional split setup:

You see now that my problem is how can I reference an event properties value (OrderId) in the conditional split config

I always get the No branch email, What am I doing wrong?

This is a screenshot of the customer profile properties:

Help please?