Im seeing this issue as well on random nodes, but only using the server details view and clicking list resources from the management view. If i list resources from Settings -> manage nodes it works just fine.
http://www.solarwinds.com/Modules and versions installed: Orion Platform 2014.1.0, SAM 6.1.0, IPAM 4.0, NCM 7.2.2, NPM 10.7, NTA 3.11.0, WPM 2.0.1, IVIM 1.9.0, VNQM 4.1