Texture Bug - Odachi upgrade on Samurai (Man at arm)

Hello,

I have a texture bug on each game i play since release of the DLC when someone is Japanese (me included), the Samurai (Man at arm) unit have a texture bug when i tech the “Odachi” Upgrade at Castle Age with Veteran tech too, but dissapear when i tech Elite Samurai at Imperial Age

The only way to get correct textures is to zoom on my units, but when i zoom out the texture bug come back again

Capture2

I got that bug to but i think is when I upgrade the Samurai to Veteran. However when upgrade Samurai to Elite the bug disappears.