From Wazeopedia

Problem reports are automatically generated reports, that appear in the Waze Map Editor as a colored balloon without a smiley face. Balloons with a smiley face are user reported Update Requests and are covered in the paragraph above. Map Problem Missing road.png There are several kinds of MPs. In Base Map Areas you will find Missing road and Restricted turn might be allowed most often. Other kind of MPs are described in the Global Page on Map Problems. Try to solve the problem and close the MP as Solved. If you don´t know how to solve it, please discuss it with a local champ first before closing it as Not identified.