Not able to access other deployments processes in the same transaction when using PerRequest strategy in BPM Suite 6

Issue

• We have two deployments in our application and in the same transaction we can access a deployment processes and other resources, but the second deployment resources can't be accessed
• When we have two deployments and start a process from deployment1 and then try to start process from deployment2, we have an error saying that the second deployment process definition can't be found, even if it is defined;
• It is a problem specific to PerRequest runtime strategy, it works with the other strategies.

What could be wrong?