Docker container started with one file missing, while rest is working fine

We have a single image docker of payara based applicated present. We had setup AWS autoscale and configured ECS for the docker conatiner. From one out of 4, docker image started properly with no error but later we found that one file of the application is missing. What can be issue or reason for this ?

Where is the image coming from? Did you build it yourself? Did you fix the version or use latest?

Image is on already on aws ecs, we have build it ourself. same image has been deployed in our environment and recently 5 docker instance of the same image are been deployed. We faced this issue on one of instance only while rest were working properly.