Troubleshooting n8n AI Agent: Why Gemini and Mistral Workflows Stall
n8n users report AI Agent workflows failing with "Failed to receive response" or getting stuck at 'Waiting for you to submit the chat' when integrating Gemini and Mistral. The root causes typically lie in webhook/trigger behavior, streaming vs blocking API modes, tokenization limits, or self-hosting resource and networking constraints.
The n8n community issue where the AI Agent chat hangs most often stems from the interplay between n8n's chat-trigger flow, the LLM node's connection mode, and platform-specific networking. When an LLM node indicates successful credential validation but the chat trigger shows 'Waiting for you to submit the chat' and then never progresses, the system may be waiting on a streaming response that the node or host cannot handle (webhook timeouts, proxy interruptions, or container networking quirks on TrueNAS Scale). Alternatively, the provider client libraries may expect server-push events that aren't reaching the workflow.
From an engineering perspective, verify end-to-end connectivity: check n8n server logs for websocket or webhook errors, enable verbose LLM node logging, and reproduce the flow with a minimal prompt to determine whether chunking/streaming is the culprit. Confirm that webhooks are reachable from the provider (no NAT/firewall blocking), extend timeouts, and test non-streaming request/response modes if supported. On self-hosted platforms, resource limits (CPU, ephemeral disk for buffering) and container networking settings can silently drop streaming connections.
For business leaders managing automation at scale, this underscores the hidden operational cost of self-hosting integrated AI workflows. Ensure SLAs for automation uptime, include observability requirements in vendor evaluations, and consider managed n8n or hosted alternatives to reduce infra debugging overhead. Have runbooks that specify log captures, endpoint reachability tests, and a fallback anti-stall path that switches to synchronous API calls.
Actionable checklist: upgrade n8n to the latest patch, toggle streaming vs blocking in the LLM node, validate webhook reachability from external endpoints, increase chat-trigger timeouts, and instrument end-to-end telemetry. If problems persist, isolate with provider SDK examples outside n8n to determine whether the issue is platform or model-specific.
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n8n Community