n8n Webhook URL Displays localhost Instead of Public Domain on EC2 Deployment

I deployed n8n locally on EC2 using the n8n Docker image, and set up nginx as a reverse proxy on a dedicated n8n network. I specified the N8N_BASE_URL as my public domain, and it shows correctly in production.

However, the webhook URL in n8n still displays as localhost:5678, which is causing my webhook to not verify on Meta.

I have checked both the nginx.conf and docker-compose.yml, and everything appears to be configured correctly. Could anyone provide a solution to this issue?