Duplicate webhook requests for Subscription for changeType="created" for same mail

Question

Hi Issue is, I am subscribing to email notificaiton on mail signed into my app via oauth. the subscription is purely for changeType="created" . But when i receive request for new mail via webhook, there are times it sends two requests instead one. This is causing inconsistent behaviour in our system.

Ideally, this shouldnt be the case, as changeType="created" should happen just once for a mail as far as i know. To top it, i know its not a retry cause, this happens in a span of 200 ms, which i dont think is your retry time.

Could you help me with the same?