generative-ai video for a Generative AI Engineer is deploying a RAG application that answers user questions about product warranty policies. The model is
A Generative AI Engineer is deploying a RAG application that answers user questions about product warranty policies. The model is deployed using Databricks Model Serving and uses a pyfunc model with pre- and post-processing logic. Users report that the model sometimes returns raw text with inconsistent formatting. Upon inspection, the engineer finds that only the core generation logic is executing — the input validation and output formatting are being skipped. What is the MOST likely cause of this behavior?