Again brief feedback on the problem: It seems as if the cartridge case is not transferred to existing class templates. You have to delete two of them and replace them with a copy of the first template with all settings and an existing sleeve. The copies from the first template can then be adapted to the previously deleted loadout. This also brings the case back into the inventory. (Perhaps the same procedure can also help to trace back removed or missing bandages / Strike Designator.)
A huge thank you to gingerbeardman79 for this great idea!
Thank you for the extra information about this. Adding it to the report to help in the investigation.