Fork not run after outcome

I am using Elsa 3 with the new Flowchart. In this part, when the outcome is "True", everything works fine. But when the outcome is "False", the workflow gets stuck at "checkNeedCashActivity", and the Fork does not start.
Where is the problem?
When I delete new Connection(new Endpoint(financeUnitPayCash), new Endpoint(fork)), it works.

new (new Endpoint(checkNeedCashActivity, "True"), new Endpoint(financeUnitPayCash)),
new (new Endpoint(checkNeedCashActivity, "False"), new Endpoint(fork)),
new (new Endpoint(financeUnitPayCash), new Endpoint(fork)),
new (new Endpoint(fork, "report"), new Endpoint(employeeMissionReportActivity)),
new (new Endpoint(fork, "cost"), new Endpoint(employeeMissionCostActivity)),