Map layer disappears when I open the Details/TOC panel

Discussion created by marylandgis on Jul 19, 2013
I added the FEMA NSS (shelters) map service to my public map here:

The layer was not showing up when I re-opened the map today.  Then I discovered that it appears when I close the Details/TOC panel, disappears when I open it.

Anyone see this before?  Know how to fix it?