How often do webhook calls back to our URL come? Based on our testing, it is not instant. We can’t find anything in documentation or the forum that states how we can expect the hooks to come to us after triggering events.
Webhooks are currently down or very delayed. We’ve alerted Asana developer support.
The best thread to follow to stay updated on this issue is: Missing events and no "sync_error" recieved on that webhook endpoint. - #21 by Phil_Seeman