I wouldn't say it's a bug, more like lack of coding or otherwise. Roundabouts irk me the most due to the probably notorious by now 'having to use blinkers when entering an roundabout'.
Then again my road law does not apply everywhere and it is not universal, I live in Poland, hereby I know Polish road law;
In Poland you only turn the blinker when entering a roundabout if you're leaving it at next exit, a.k.a. turning right/rightmost. Otherwise you enter a roundabout without blinker use. AI seem to care not about that and instead do it anyways just because they turn right. It's mostly a pet-peevee, but yeah.
Also, inter/crosssections - turning left. I'd say less of a pet-peevee as I get red messages for that for 'driving in a forbidden direction' most of the time. In Polish law it is not required but heavily encouraged to use right-most lane, same applies for turning left. If the left lane is the only lane that allows you to turn left, it matters not since you have the ability to turn into the right-most lane anyways. That does not apply here. If I get the logic right, you have to turn in on the same lane you entered the inter/crosssection from.
Third, stop signs. They're russian, just translated. While I can understand it probably was not top-priority to make a hexagonal 'stop' sign, it would be more accurate.
Plus the astounding lack of road surface markings which are a staple in driving on the roads.
And lastly, you can get warned for entering a cross/intersection on a green light that turns red after you enter it, be it because of traffic or other situations on the road. I try to make my settings match more or less realistic settings of a busy metropolitean city, with about 80% traffic, fast-moving and 70% pedestrians. While keeping all emergency situations rare, with most common one being wonky road-behaviour (brake checking, changing lanes randomly, etc.) and pedestrians crossing the streets outside of street walks, which is afterall common, but still rare overall.
Though generally this post is about road law or hereby thereof lack of it. I also wanna point out Ruber, is it just me or the passengers seem to be very delicate whenever it comes to braking/accelerating?
Again, just stating in regards of my country's road law, out of sheer curiosity because I want to know what others think about all this. If community were to make map(s), they probably would be primarily used instead ngl.