Horizontal taxisigns no longer visible

the horizontal taxisigns made with materials are seen in the project but are invisible when in normal mode. This is not true for all airports, I am talking about airports made from scratch, not existing Asobo, on which the horizontal taxisigns are not seen in the normal way, but are seen in the project.
For modified airport but present in Asobo the horizontal taxisigns can be seen.
This happens from last update 1.14.6.0.

Hello and thanks
PROJECT


REAL

I solved delete and reinstall assets package