Invisible camillan triarii

Hello everyone,
I've recently installed 2.35 and started playing with Romani. However, I've noticed in my first campaign battle that the camillan triarii are invisible up close. Their officers are visible.
They are visible from afar (their sprite is rendered), so the problem seems to lie in their model or texture. All the other units I've encountered are visible.

Thinking their model or texture might be corrupted, I re-downloaded the non-installer version of the mod and overwritten the corresponding models and textures, but the problem wasn't solved.

I should mention I'm using Linux and Steam. I'm using the Windows version through Wine so I have the correct settlements. The problem might lie in my setup, however I've had no other problems and, in every other respect, the graphics are perfect.

I'm attaching a screenshot. If I have the time, I might try installing the Linux version and see if the problem appears there too.

Has anyone else had this issue? Is there any solution?

Thanks in advance

Have you tried a different unit detail level? Or changing the shader setting?

I tried both changes but to no effect. Changing the unit detail level only affects the distance at which the bug appears, while changing the shader version does not have an effect on the bug.

I tried reinstalling everything (Steam for Windows, DirectX, M2TW and EB2), thinking something might have gone wrong while installing DirectX, but nothing changed. Do you have any other suggestion?

EDIT: I tried installing the Linux (Feral Interactive) version of Medieval 2 and the bug does not appear there. However, since I would have to play with vanilla settlements, I'd rather solve the bug in the Windows version if possible.

I don't have Linux, so won't be able to help directly. However, it sounds like something is missing, and it's especially interesting that you can see the units in one O?S but not the other. I suggest you download WinMerge (it's free) and run a folder comparison between both installations to see what is different. With any luck it will be something obvious.