In the World Editor Custom Campaign Object Data some default items are missing.
- If you compare the Unit tabs in the empty default map and empty default custom Campaign, the map data has 862 units while campaign has 836.
- Same for Items (Map 283 vs Campaign 232)
- Same for Abilities (Map 816, Campaign 807)
- Same for Buffs (Map 240 vs Campaign 238)
- Same for Upgrades (Map 90 vs Campaign 58)
My guess is that Campaign object editor lacks some updated data that Map has for the default standard game entities.
Bug Reproduces only when the Custom Campaign Editor is opened in on the World Editor Startup.