Static is not a classification; in this case the classification was cycling between "unknown", "vehicle", and "bicycle", and each time the classification change

Static is not a classification; in this case the classification was cycling between "unknown", "vehicle", and "bicycle", and each time the classification changed the history was reset. Then each detected object can be either static or be assigned a predicted path, but unknown objects without a history are always treated as static. In any case, the history clearing seems to be a bug, they updated the software to keep the position history even when changing the classification.