Last Published: January 11, 2016ArcGIS Online
Bug ID Number
December 21, 2015
December 1, 2020
Will Not Be Addressed
The development team has considered the issue or request and concluded it will not be addressed. The issue's Additional Information section may contain further explanation.
This is by design. The number of levels of detail (LODs) available is set based on the first map loaded. So, if using Esri basemaps, it does not go beyond 19. The Open Cycle Map web tiled layer is based off of the OpenStreetMap layer and has the same amount of LODs as the Esri basemaps. This explains why it does not go beyond 19. If resampling is enabled, it does not mean it can resample to any scale. The only purpose of resampling is to enlarge the image and fill in at the levels where there are no tiles available. This should not affect the LODs, as they are already set with the original basemap.
Additionally, the tile service used as a basemap in the Streets23 map service from the following link, http://tiles.arcgis.com/tiles/Wl7Y1m92PbjtJs5n/arcgis/rest/services/streets23/MapServer\,
shows all 23 LODs, even if the Homestead web tiled layer is added after the custom basemap (although it cannot be seen, assuming it is not in the same coordinate location).