STM with draped raster to iModel

Hi!

I've created an iModel (.i.dgn format) from adgn containing only a STM and 2 attached rasters. Raster are draped to STM as you can see in the capture:

But when I open the iModel in Navigator the draped image has dissapeared:

I've tested both with "Keep Original" and "Reduce Size" in Raster Settings

OpenRail 10.03.03.18

Navigator 08.11.09.713

Any ideas?