Snapin for Office ProPlus device based activation no longer working

[doestreicher]

We have Office 365 ProPlus in our Windows 10 Fog Image. We are a school district and use the device based activation. After imaging, a Fog snapin runs a batch file that calls the opptransition.exe with the noinstall parameter so it does the activation only (since it needs to run after the computer is renamed, which Fog does).
The strange thing is this snapin used to work fine. Recently it stopped working properly. We can see in the logs the process creates that the snapin is calling the process successfully, but the activation process is not working right for some reason. But if I manually run the same batch file it activates fine.

Any thoughts?

Thank you!