Performance regression on 9.11 (vs 9.7)

[arnabadas]

What version of OR-Tools and what language are you using?
Version: v9.11
Language: Python

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

What operating system (Linux, Windows, ...) and version?
Windows 11

What did you do?
Prepare an input where there are many sizes of trucks and all are allowed at CFA. The bigger trucks should have cheaper cost per kg. (both fixed and variable). In all the delivery locations keep the demand as the capacity of the smallest truck and only allow the smallest truck in those locations. Do "cvrp_reload" like scenario. Use "best_insertion" first solution strategy in ortools v9.7 to see the best output.

What did you expect to see
Reload happening

What did you see instead?
Reload not happening in v9.11 but happening in v9.7

Make sure you include information that can help us debug (full error message, model Proto).
NA

Anything else we should know about your project / environment
NA

[arnabadas]

Will reopen after providing a solid example