No. Here is a better example. I have two types of workstations: Type X can execute tasks of type A and B. Type Y can execute tasks of type B. This could be the case if type X workstations have for example more VRAM, newer drivers, etc...
I have two queues. Queue A and Queue B. I submit tasks of type A to queue A and tasks of type B to queue B.

Here is what can happen:
Enqueue the first task of type B. Workstations of type X will run this task. Enqueue the second task of type A. Workstation of type Y cannot execute it (and is not listening to queue A), so wait for the first task to finish. Workstations of type X runs the second task
Here is what should happen (should start from 1., but when saving slack just continues the list):
Enqueue the first task of type B. Workstations of type Y will run this task. Enqueue the second task of type A. Workstation of type X will run the second task.