In an ArcGIS Online web map, the order of the layers in the pop-up window appear to be random, relative to the order of layers in the Table Of Contents.
Last Published: July 15, 2015ArcGIS Online
Bug ID Number
December 30, 2014
August 21, 2020
Operating System Version
After review by the development team, it has been determined that this issue is related to a known limitation with the software that lies outside of Esri's control. The issue's Additional Information section may contain further explanation.
The order depends on how fast the queries execute.