Session host drains users but broker still routes new logons there

Scenario

An admin enables drain mode, but new sessions still occasionally land on the host.

Recommended Resolution Path

1. Review broker drain settings, collection configuration, and whether reconnect behavior is being mistaken for new routing.
2. Check if another management layer or script resets the host state.
3. Capture broker logs during a test connection.
4. Avoid maintenance until routing behavior is deterministic.

Technician Notes

Capture the exact scope of impact, confirm which dependency failed first, and document whether the issue reflects broader domain or server drift.