Mongols still need to research horsemen

From what I have gathered through the forums and previous betas, mongols had their dark age horseman changed to feudal, and the tooltips are still outdated.

However, mongols still train First Horsemen as their base horsemen line unit in the feudal age despite not being able to train them in the dark age, they still need to reaserch the base horsemen upgrade to be on par with other civs that can train regular horsemen

Is this intended? Its this maybe a thing to balance out them being able to build stables in transition?

You should still be able to build early horsemen in dark age. It was feudal age early lancers that were removed.