Volvo FH '12 / DAF XF Euro6 - DRL & Parking Lights bug

[-Raiden-]

When playing with the Volvo FH '12 and DAF XF Euro6, I noticed that the combined parking lights / DRLs don't work correctly. When the ignition is turned on, the lights are on (as they should be), but when the ignition is off, the lights are also off. Which is the not the case for the real trucks.
The DRLs dim down correctly when the headlights are turned on.

Game Version: 1.26.3s
Mods: None, clean profile
Reproducibility: Always

Example Images:

With ignition on:
[ external image ] [ external image ]

With ignition off:
[ external image ] [ external image ]