Flashing beacons do not flash in ETS 2

[Roman130998]

Friends, tell me, please. Flashing beacons do not flash in ETS 2, which are installed on trailers or on police cars, firefighters, technical assistance vehicles during emergency situations on the road. Flashing beacons just glow like headlights, it really affects my perception of the game, and is extremely unrealistic.
To solve this problem, I turned off all mods, reinstalled the game, or changed the version of the game, also downloaded mods that change the speed and frequency of flashing beacons. Nothing helped me.
Please, I beg you, help me solve this problem!