firebase - firestore cloud functions onCreate/onDelete sometimes immediately triggered twice

Question

I have observed this behavior occasionally with both onCreate and onDelete triggers.

Both the executions happened for the same document created in firestore. There's only one document there so I don't understand how it could trigger the handler twice. the handler itself is very simple:

module.exports = functions.firestore.document('notes/{noteId}').onCreate((event) => {
  const db = admin.firestore();
  const params = event.params;
  const data = event.data.data();
  // empty
});

this doesn't happen all the time. What am I missing?

Answer 1

Waitting for answers