PS - Item Gantt view

Hello,

Inside Production Scheduling, in the Item Gantt view (VCP: 12.2; Product Build: 12.2.5.C604) what's the reason for only certain items to have the item levels bars?

For example, does it mean that the items A;B;C;D; are not required for the jobs within the schedule horizon, thus the solver won't consider them?

Another issue, when we select a specific item category from the dropdown list, it doesn't display any items, when they have been correctly defined in EBS.

Thank you,

Kind regards.