The World Gate that was constructed by the World Government also follow this method and rule to avoid expending too much energy and to avoid falling into other worlds.
The only way to explain it is that whatever happened to the portal is the reason for this weird phenomenon.
Azief believes that if he goes to the lane beside him, he would also sense another lane beside him. And so on and so forth to infinity.
An infinite world theory. Of course, he is not interested in whether it is true or not.
As for the glimpses, it is not like he saw just flashes of image. It is not like someone just flash an image card in front of his eyes.
That would be wrong.
this glimpses seems to be some kind of an information stream method. His eyes saw a glimpse and the information about it streams into his mind.
It was mostly because of his Divine Sense where it could quickly process the information in a matter of less than a nanosecond.