When dispatched to crew, assigning lead missing

When dispatched to crew, assigning lead missing

Hello,

For the past two or three weeks, whenever an officer assigns Service Appointment to a team, the lead person is missing from the assigned service list. Therefore, we have to reschedule the SA and then the lead person becomes visible in the assigned Service Resources list. But as a admin, I tried to assign a SA to team, there is no problem. This error slows down our assignment of jobs.

I attached picture. Above person is in same crew actually. But he is missing in the crew list.

We need your supports