Routing logs missing after solving with cp-sat

Hello

**What version of OR-Tools and what language are you using?**

Version: 9.15.6755
Language: Python

**Which solver are you using (e.g. CP-SAT, Routing Solver, GLOP, BOP, Gurobi)**

Solver: Routing solver and CP-SAT

**What did you do?**

After solving with CP-SAT solver the logs from routing solver are missing, even if enabled with `search_parameters.log_search`.

Example to reproduce the issue:
[main.py](https://github.com/user-attachments/files/24858524/main.py)

**What did you expect to see**
Logs to be configured independetly

**What did you see instead?**
Logs from the second run of routing solver are missing.