Finding/compare entities from two databases

Hello!

I’m setting up a scenario through Integromat that’s supposed to get entities from database-1 (RnD) which contains a field with text type and check if they exist in database-2 (CRM) where entities are inside an entity collection field with a different type (format)

I was trying to do it via operators q/contains (no success) and q/in.

Seems like everything should work and there are no errors but the result is Empty

P.S. if I need to share some examples or anything else for clearer understanding let me know please

[
  {
    "command": "fibery.entity/query",
    "args": {
      "query": {
        "q/from": "CRM/Waiting list",
        "q/select": [
        "CRM/Invite Code", 
          { 
          "CRM/Invite Code": {
            "q/select": ["CRM/Code"], 
            "q/limit": "q/no-limit" 
          }
        }, 
          "CRM/Person", 
          "CRM/Job role"],
        "q/where": [
          "q/in", 
          ["CRM/Invite Code", "CRM/Code"], 
          "$code"
        ],				
        "q/limit": 20
      },
        "params": {
          "$code": ["RnD/Code"]
        }
    }
  }
]