Traffic light problems…

In itself, traffic lights do not cause any problems: it is clear that you are standing at red, driving at green, and when the traffic lights are switched off, do not blink and a traffic sign signals ahead, then you can also drive. So far the theory… In practice, however, it sometimes looks different. Today experienced: bypass road, speed 70 allowed, and on Sundays some traffic lights switched off, which is quite pleasant and enables fast driving. But suddenly, at one of these traffic lights there were a few driving times. euge, I had to stop. At first I thought that this traffic light might not be switched off and red, but a short look was enough to identify the traffic light perfectly as switched off. Well, I thought, the front car might have a breakdown or something, that can happen. After some time he also drove off. But at the next traffic light the same thing: again switched off, but this car stopped again. Luckily then someone immediately jumped, and then he drove, but at the next traffic light the same thing: again switched off, but this car stopped again. I wonder what was going on. We drove in a northerly direction, i.e. glare passes through the sun. Then, a while later in the city, I was (fortunately) only pedestrian and thus uninvolved observer: At a traffic light, which was switched on, I saw it immediately at two green phases, that the first car did not go off and only had to be “awakened” by horns of the rear man. Also here no glare through the sun, however, one of the drivers reacted also the hooving at first not, but gesticulated wildly around, absolutely incomprehensible. Was that about the spring fatigue?