Today while helping in the n8n community I noticed many duplicate event issues come from retry behavior rather than logic bugs.
One useful thing to check:
Webhook response timing + unique event IDs.
Synthetic test environment.
Not client work.
Hello, do you need help, you can hire me as your part time n8n helper, I built n8n for 2 years dealing API and ids of recipients for both sender and receiver also use with AI. Feel free to contact me on mt email, angelo.salvacion@gmail.com.