TRAEFIK DEFAULT CERT Issue

I am using Traefik as reverseproxy in Azure Service Fabric. Suddenly facing issue in Traefik certificate. Receiving "TRAEFIK DEFAULT CERT" cert while accessing. Due to this application went down. When we restart the Traefik its working as expected. Any additional configuration needed.

Using following configuration

tls:
certificates:
- certFile: "./certs/fortraefik.crt"
keyFile: "./certs/fortraefik.key"
- certFile: ./certs/servicefabric.crt
keyFile: ./certs/servicefabric.key
stores:
default:
defaultCertificate:
certFile: "./certs/fortraefik.crt"
keyFile: "./certs/fortraefik.key"

Do you have any Traefik logs from the time when the cert stopped working?

unfortunately we don't have logs

I highly recommend to use absolute paths for the files.

We can't use absolute path, as we using Traefik in Azure Service Fabric. On provisioning Traefik app absolute path will change. Is my above configuration ok? any changes required