The Measure tool in ArcGIS Online map viewer to measure distance does not show live interim distance between two points for a basemap in the following projection, S-JTSK_Krovak_East_North WKID: 5514 Authority: EPSG.
Last Published: August 27, 2015ArcGIS Online
Bug ID Number
July 23, 2015
August 21, 2020
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.
Unfortunately, this is an intended side-effect of using projected-coordinate-system maps.