A rebuild of the failing workflow after migration from Zapier to self-hosted n8n. Switch between the state it arrived in and the hardened state to see which four settings were dropping calls.
Figures describe a 30 day sample of 1,204 inbound calls. The four faults shown are the ones that survived the Zapier migration: a webhook response mode that outlived Retell's tool timeout, a container with no timezone set, transfer numbers passed without E.164 formatting, and a Twilio error output wired to nothing.