Lead form of Old BA BL is still visible in UI, Even after selecting new BA BL.

The select Lead form drop down is still appearing in UI, After the changing the Primary BA.
Step to recreate:
1. Add multiple BA and BL.
2. Select primary BA, BL Social column.
3. select Lead objective and select lead form.
4. change the Primary BA and BL.
Expected: Selected lead form form another BA, Bl should not appear in UI.
Actual: Old BA BL's lead form still appearing in UI.