vCenter Plugin SDK connection not returning any VMs

I've been having some issues recently with the vCenter plugin for vCO, specifically for one SDK Connection (I have three in total).

During my provisioning workflow, I try to convert a vCloud Director VM to a vCenter VM, using the vCenter plugin, so I can use the VIX plugin to perform some scripts in the VM.

However, when I try to do the conversion, the vCenter plugin isn't returning anything.

Script:

     var arrVMs = new Array();

     arrVMs = System.getModule("com.vmware.library.vc.vm").getAllVMsMatchingRegexp(VclVM.name);     //VclVM is type vCloud:VM

     var VcVM = arrVMs[0];

However, I don't get anything in arrVMs. I've tried doing it in a test workflow:

     var arrVMs = new Array();

     arrVMs = SDKConnection.getAllVirtualMachines(); //SDKconnection is type VC:SdkConnection

     System.log("Number of VMs: " + arrVMs.length);

I ran it and I get "Number of VMs: 0" in the log.

I find this weird because I'm able to find all the VMs I need in the inventory view, it just doesn't work with scripts.

If I restart the vCO service through the configuration page, it DOES work temporarily, for a few minutes, then it goes back to this.

The SDK connection does have a large number of VMs (over 1200). Would that cause a memory issue? I even tried querying using xpath syntax (xpath:name[starts-with(.,'" + VM.name + "')]) so I wouldn't have the server return ALL the vms and then parse through them all, and I still got nothing.

Any ideas?