Doorbell not recording after midnight

It appears this problem of doorbell video not recording after midnight is a common known problem to Ring but has not been solved by them. I have bought 3 ring doorbells wired for family and all have the same issue that after around midnight till approx 5.00 am there are no motion detections of anything in history. I live on a busy road and although quieter at night there is still plenty of activity so whats going on with this problem. Motion detection settings all checked, zone checked, sensitivity checked and all set ok. Whats the point of a camera that at the most important time of the night doesnt capture anything.