Common Vapi Issues & Quick Fixes (this week) 1. Delay after transfer, Enable hold music or use direct-to-agent bridging. 2. Assistant silent after tool call , Set continueOnToolFinish: true + return text output. 3. Outbound calls fail / 400 error , Use E.164 format (+123...) + check Twilio number assignment. 4. KYC stuck → Try incognito + smaller docs, else email support. 5. Structured data missing → Check webhook + enable enableStructuredData: true. 6. ElevenLabs error → Remove unused key or set default voice. 7. Lag after ~19s → Test stable net/VPN, lower sample rate to 16kHz. Hope this saves someone a headache!