The Layer List widget in ArcGIS Web AppBuilder for developers version behavior is inconsistent when publishing or overwriting a service (which is used in the application's web map) with group, and nested layers with the 'Allowing assignment of unique numeric IDs for Map Service Publishing' option enabled.
Last Published: March 7, 2016ArcGIS Web AppBuilder for Developers
Bug ID Number
November 23, 2015
August 21, 2020
ArcGIS Web AppBuilder for Developers
Operating System Version
2008 R2 64 Bit
The bug has been fixed. See the Version Fixed and Additional Information, if applicable, for more information.