Firmware Baseline doesn't see all servers

Firmware Baseline doesn't see all servers.

Just a Few ABSOLUTELLY identical R750 with absolutely identical configuration, which were successfully onboarded, Refreshed, Inventory ran many times, are showing only with IP address, while others are with hostname.

When I tried to create a Firmware/Drivers baseline and I am offered a list of all possible servers, I see only servers which are displayed with hostname, servers which everywhere else are shown only with their IP, are not present here. So I am not able to apply the Baseline on them.

I tried to delete one of them from the OpenManage inventory (without the forceful options because of the scary warning), onboarded back successfully, but still only showing IP, not hostname.