Does it behave like this in all browsers please?
Also, when running tools from the drop-down menu right next to the node name - do they run properly?
I have the same issue, but it is just with IE. IE prompts that 'a script is frozen, Do you wish to stop the script?'
Edit: Whoops I just saw how old this post was. I am having this issue currently though.
Orion Platform 2015.1.0, SAM 6.2.0, QoE 2.0, NCM 7.3.2, NPM 11.5, NTA 4.1.0, Toolset 11.0.1, IVIM 2.0.0