CCR routine stuck indefinitely at 'Setting up a cloud container'

Summary

A Claude Code Remote (CCR) routine gets stuck at the \"Setting up a cloud container\" provisioning step and never progresses. The session never starts, the container never becomes ready, and there is no timeout or error surfaced in the UI — it just hangs forever.

Environment

• Environment ID: env_016SbNzQutHAHSFG9W6msTFX (kind: anthropic_cloud, name: Default)
• Trigger ID: trig_018USzJRjmdW6xGbft7o3p9f
• Model: claude-sonnet-4-6
• Git source: private GitHub repo (authenticated via PAT embedded in URL)
• Triggered via: both scheduled cron (0 15 * * 5) and manual \"Run now\"

Steps to reproduce

1. Create a CCR routine targeting the anthropic_cloud Default environment
2. Trigger it (manually or via schedule)
3. Open the routine page at https://claude.ai/code/routines/<trigger_id>
4. Observe: the UI shows \"Setting up a cloud container\" indefinitely — no progress, no error, no timeout

Expected behaviour

Container provisions within ~30–60 seconds and the agent session begins.

Actual behaviour

Container setup hangs at step 1 for 6+ minutes with no progress. Stopping and re-triggering exhibits the same behaviour repeatedly.

Additional notes

• The GH PAT and git source URL are correct (verified by inspecting the stored routine config)
• The hang occurs before the git clone step, so authentication is not the cause
• Other routines targeting the same environment exhibit the same issue when first triggered
• Appears to be a cold-start / provisioning issue specific to newly created anthropic_cloud environments