Linked models strange material behaviour

Hi guys, I tried browsing the open threads but it appears noone pointed out this issue already.

I use a lot of dynamic components changing Materials given the choice of the user. Some of the components use the LINKED MODEL Enscape feature (wonderful for us to simplify the current 3d model).

I noticed that recently (I’m using the 4.18.0.740 version) the behavour of Enscape in representing the material applied to the “hipoly” referenced geometry is weird: sometimes it applies the material correctly, sometimes not, and if I re-send the model to enscape the behaviour changes unpredictably. Can you guys support me and help me fix this?

In previous versions everything looked fine!

I’m attaching BINARIO OMNITRACK.SKP which is a sample skp DC model, and a folder containing the external linked models (which you guys will have to re-link using your specific path for them to work)

thanks a lot in advance

EDIT

I tested the current beta version and the latest stable versions and both feature the same (wrong) behaviour
file.bin (246 KB)