There are two possible explanations for this:
If the former, patience is key - this site covers thousands of entities, and all must have a manually created description written.
If the latter, try renaming the property - 'Domitian as Caesar' has no description, but 'Domitian' does.
Reverse: naked Gallic warrior riding in biga right, holding spear, reins, shield and carnyx; L·LIC·CN·DOM
Die Orientation: -
Weight: 3.9 g
Narbo mint L. Licinius Crassus and Cn. Domitius Ahenobarbus Narbo, the first colony in Gaul, was founded 118-117 BC. L. Licinius Crassus and Cn. Domitius Ahenobarbus were officials charged with founding colony (duoviri coloniae deducendae). L. Porcius Licinus was one of 5 officials charged with production of denarii (curatorec denariorum flandorum). Reverse probably commemorates victory of Cn. Domitius Ahenobarbus (consul 122 BC) in southern Gaul. He and Q. Fabius Maximus attacked united Gallic tribes of Allobrogi and Averni led by Bituitus at the confluence of Rhone and Isere. Their triumph was celebrated in 120 BC.