Hi Gijs!
Thanks so much for providing your webhook ID and helpful details for us to investigate!
I looked into our logs and found that after a high volume of errors, your webhook subscription was temporarily disabled for 24 hours on 2021-07-06, then automatically re-enabled on 2021-07-07. We are looking to make the webhook subscription status available for you to see in cases like this, so I have noted your instance as a request for this functionality.
We enforce a 3.5 second timeout on webhooks and your webhook will return a 408 error if you attempt to do too much synchronously on your end. It is best practice to return a 200 status quickly and do additional processing async. For more information and best practices, feel free to review our
Webhooks Documentation here.
Best,
Natalie