SCVMM debug log for ODX to BITS fallback

I have a case where I'm looking in a SCVMM trace file for an ODX to BITS fallback problem. It looks like some kind of authorization or authentication issue but it is not clear I'm looking at the correct trace lines before the fallback.

WindowsCopyCredentialFixup.cs,297,Reverting credentials for file ...

Then

NewVMSubtaskBase.cs,3580,Deployment type WindowsCopy for VM XXXXXXXXXXXXX no longer possible, attempting fallback to BITS deployment for VM files,

Would this be consistent with a loss in communication or some other issue? What should I look for before the fallback?

Thanks.