The particle tracking issue in simulation while using moving window block

[zwjlpi]

Hi,
The ejected_particle was used to track the particles left the simulation domain. However, the particles that left from the moving boundary can not be recorded when the moving window start work, except the particles that left from the transverse boundaries. The particles ejected from the moving direction dominated the particles that left the whole simulation domain, which is significant for statistics. Any suggestion to deal with this issue would be quite appreciate. Thank you!