"Micro lags" - British and American Line Infantry

First of all, the mod and the depth of detail are amazing but I have a "Problem". When I hover over a unit of british or american line infantry, the camera begin to lag a little bit, also when I zoom in to a frontal view of the unit. Doesn't matter if it's one regiment or more (doesn't get worse if there are more). These are the only units, using new models, where the problem occurs, other units with new models work normal and all the ones, which are just reskinned also. When the mentioned units are moving and I turn the camera, so I see their backs, it's also no problem. Anyone any idea or maybe the same problem?