Cloverleaf 5.6 NetConfig/NetMonitor view setting changes

All (13) sites NetConfig and NetMonitor views show our threads with no route arrows pointing to their end threads. The quick fix is to select View/Show all threads and the arrows appear. How does this happen if none of the developers made a change for the problem to happen. We do have OPerations monitoring at the data center which I believe it may have been them but that means every site would require a change manually. Has anyone seen this before on 5.6 or can you help me find out who may have done this and how it was done if not through the gui?