3d linestyles disappearing after export to LumenRT

Hi all,

I am working on the 2020 R3 version of OpenRoads Designer and LumenRT Designer version 14.

I am trying to implement road railings to LumenRT as 3d lines. I am using built-in linestyle Guardrail Flared End. I also created some new 3d lines (yellow railings you can see on the image).

The problem is, none of them is shown in LumenRT. They are not listed in layers as well.

The road is approx. 12 km long. Could that be the problem? Or where should i find it? Does anybody knows where should I look for the solution?

Regards