Achieve true determinism in CPLEX

Question

I'm unable to achieve true determinism in CPLEX (I'm using the DOCplex python API). Even if the best integer optimal solution is found without going to timeout (so it is expected to be unique), two identical separate runs leads to different results.

I'm setting the model parameters in this way:

cplex_model.parameters.randomseed = 42
cplex_model.parameters.threads = 1

Also I'm fixing every random seed that could be involved:

os.environ['PYTHONHASHSEED'] = str(seed)
np.random.seed(seed)
random.seed(seed)