Throttling when battery is around 20 % , without turning on battery saver mode

My Nexus 6P gets really laggy when the battery percentage is approaching 25-20% , like some sort of throttling kick in , but I'm completely sure that the battery save mode is disabled , is this standard Android behavior ? I remember facing the same issue with my Nexus 6

Gesendet von meinem Nexus 6P mit Tapatalk