Need to understand and address session auto-creation

[odp]

In current prod jobs, there is this one entry where we are auto-creating a (deleted?) session.

2340248:(RolloutManager pid=1771028) 2026-06-24 15:55:59,503 pid=1778013 WARNING miles.rollout.session.linear_trajectory: Auto-creating session ea51976991614756bc71829cd1153626 (not found, likely router restart)

Few questions that need investigation:

1. Why is it happening once per job?
2. Do we lose the state of the existing session/task when we auto-create a session?