This can happen when the BOM has not been refreshed before running the report, check a fabrication report and the bottom section under the picture will be missing also. Check that Defer Pricing is not ticked under the Pricing folder and then refresh the BOM by clicking on the BOM folder near the bottom of the item tree, now retry running the report to check if the glass type has come through.
Please contact Alspec Software Support 1300 760 106 or Soft-tech 1300 139 980 for further assistance.