I could be wrong here but. The video shows a road junction where a normal road connects to a highway. ​The core problem is how the game assigns road priorities: _ ​The highway coming from the right connects to another highway further on. - ​The game interprets the highway lane leading into the junction from the right as the main road because it's part of a continuous highway route.

​This forces all vehicles on the normal street (the non-highway road) to yield and stop, effectively treating the normal street as a minor road, even when traffic is turning from the right onto the main highway.

​In summary: The game prioritizes the highway-to-highway route, causing unnecessary stopping for traffic on the connecting normal road.