[BUG]: cuopt-agent outputs nothing after more than 10 minutes running and leaves with a "Regenerate response" button

Version

26.04.00

Which installation method(s) does this occur on?

Docker

Describe the bug.

follow the README.md in cuopt-agent, copy scenario_0.md to the UI on http://localhost:3000 and send it. There will be Intermediate Steps, but after more than 10 minutes, there will be nothing output, and only shows a "Regenerate response" button.

Minimum reproducible example

git clone https://github.com/NVIDIA/cuopt-examples.git
git submodule update --init --recursive
cd cuopt-agent
cp .env.example .env
# Edit .env and add your NVIDIA_API_KEY
docker compose -f deploy/compose/docker-compose.yml build
docker compose -f deploy/compose/docker-compose.yml up -d
Open the Chat UI at http://localhost:3000.
Copy the contents of a sample prompt and paste it into the chat input:
scenario_0.md -- Add opening inventory and compare against the baseline.
wait more than 10 minutes ...

Relevant log output

Environment details

**git***
     commit 1765f34db3ff8cc9d98f72cc10ac3526cea655ac (HEAD -> main, origin/main, origin/HEAD)
     Author: Trevor McKay <tmgithub1@gmail.com>
     Date:   Thu Apr 30 11:55:36 2026 -0400

     modfy cuopt_on_nemoclaw setup to prefer docker run for cuopt (#134)
     **git submodules***
     41967367b510f2e2d8ddb775a425a343072260f6 cuopt-agent/external/cuopt (v26.02.00a-204-g41967367)
     68580db2c44922863b75e556e70e280c9bb61f8d cuopt-agent/external/nat-ui (v1.3.0-36-g68580db)

     ***OS Information***
     DISTRIB_ID=Ubuntu
     DISTRIB_RELEASE=22.04
     DISTRIB_CODENAME=jammy
     DISTRIB_DESCRIPTION="Ubuntu 22.04.2 LTS"
     PRETTY_NAME="Ubuntu 22.04.2 LTS"
     NAME="Ubuntu"
     VERSION_ID="22.04"
     VERSION="22.04.2 LTS (Jammy Jellyfish)"
     VERSION_CODENAME=jammy
     ID=ubuntu
     ID_LIKE=debian
     HOME_URL="https://www.ubuntu.com/"
     SUPPORT_URL="https://help.ubuntu.com/"
     BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
     PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
     UBUNTU_CODENAME=jammy

Other/Misc.

No response