GPT-5.6-Terra silently fails

Git provider

Azure

System Info

gpt-5.6-terra from MS foundry. Azure Devops pipeline. pragent/pr-agent:0.41.0

Bug details

I have been using GPT-5.4 just fine for months. I just deployed GPT-5.6-Terra to Microsoft Foundry alongside GPT-5.4 and updated the azure pipeline config as such:

--   config__model: 'gpt-5.4'
++   config__model: 'gpt-5.6-terra'

When running the pipeline, I get red text (guessing an error but it doesn't say explicitly) Provider List: https://docs.litellm.ai/docs/providers. I still get comments in Azure like 'No suggestions' but its clearly just silently doing nothing. No PRs are getting feedback.