American heavy crane lights does not work

Does anybody noticed that Russian heavy crane light works at night and American does not. Though there is clearly a pair of lights on American heavy crane. Also switching into crane mode disables the main light on the truck, so they cannot be used to operate a heavy crane at night too.
Is it a bug, or it is intended to be like this?

American Crane Lights.jpg

American crane at night
American Crane Night.jpg

Russian crane at night
Russian Crane Night.jpg

last edited by Tigron

@Tigron Hm, not quite sure. Will look into this. Thanks for pointing that out.

The problem still exist in PTS 6.0

Game version: PTS 6.0 - Premium Edition + Pre-Order Bonus