Why did EA change the road congestion ?

The cause of the incident is as follows:

I set up some buildings in Sunny Isles, and after inspection, I found that there was no congestion.

But when I looked at this area again one day, I found a section of road congestion —— As long as you don't move the building and there are no congested roads in the city, it will never be congested unless the congested roads are modified. I have not changed the direction of the building, and the buildings in these places will not be affected (repairing the disaster area may change the direction of the building)

So I tried to change the direction of a traffic building (It is located at the intersection of a congested road and another road), but I found that the way to change the direction of the building doesn't work.

But just now, when I entered the game again, I found that yesterday's conclusion was not valid. EA seemed to be trying to modify the relevant code, but it caused some bugs. Now it has been fixed (?)

I was plagued by traffic jams for a while, so I checked the causes of road jams in the game in some ways - I was particularly sensitive to these details.