Ring Pro suddenly far more sensitive

Yesterday, our doorbell pro that we've had for about a year became far more sensitive. I have it set to the lowest motion capture, with a small zone aimed at people coming up our sidewalk to the house. Now, anyone who walks by on our side of the street or even the opposite side of the street produces a notification, which, if it continues, will make me ignore the notifications. Does anyone know a reason why the sensitivity would change so radically in one day?