Some N8N chatbot responses not delivering to Instagram via Manychat

​@Amra Nadaf check in Manychat, in Settings > Logs.

See if you have any ‘Response is null’ errors.

If you do, your n8n automation is taking more than 10 seconds to respond, and Manychat’s external request waits for 10s maximum for a reply.

If this is the case, you need to rework your automation and use Manychat’s API to send the response back. There are other posts here in the community showing how to do that.

Check if this is the case. If you don’t see any ‘Response is null’ errors then it’s something else that needs further investigation.

Hi @Gustavo Boregio,

I checked the logs on both ManyChat and n8n, and I’m not seeing any timeout-related errors. All the replies that should have gone through within the 10-second window were processed normally.

However, I did notice a pattern: the messages that fail to send are the ones containing heavy formatting or special characters (for example: \n\n, \n*, and similar escape characters). Messages without those characters go through consistently.

Could you confirm if ManyChat has known limitations around escape characters or message formatting in responses? And is there a recommended way to sanitise or encode the text so the messages can be delivered reliably?

Regards,
Amra

​@Amra Nadaf in that case, most likely you’re not encoding the JSON content correctly in n8n.

Make sure the response is properly encoded and escaped when you send the reply with the JSON content and it should work perfectly.