Ok thanks for your answer.
That could be a good solution but I am afraid that Workflow 2 (with Customer A’s parameters) will be still processing while triggered with other parameters by Workflow 1 (with Customer B’s parameters).
I know that I can check if the webhook 2 is processing but I will be loosing precious time while waiting for the workflow to end with Customer A’s parameters: Multiple webook calls overlaping - #5 by jan