Firebase Event parameters missing in console

Question

Here is my (Swift) code to log a particular event:

Analytics.logEvent("Category", parameters: [
    "id": cat.id as NSObject,
    "title": cat.title as NSObject
])

The "Category" event shows 296 events in the console image below. But I can't find any information about the id or title of these events anywhere. What am I missing?

Edit: this is a custom event as defined here in the docs: