Tokens not moving to the end of a process

Hello, I hope someone can help me, i'll try to make this as clear as possible

When I try to simulate process tokens flow through process as expected and then they reach exclusive gateway followed by parallel gateway. 40 of them enter exclusive gateway but after that it's all 0. Non of them reach end of a process. I don't know what I'm doing wrong. If someone is interested in helping I can include bpm file.

Than you