@Cyrus Cheng I wasn't able to reproduce the issue you saw, but I've reported this to the product team so that they are aware of the issue. Thank you again for reporting this! If you run into this again please let us know and we can resolve your lab issue for you.
Additionally, it is possible to export your template VM as a Shared Image Gallery image. This would make it easy to create your template VM again if needed. You can refer to our documentation for more information:
https://learn.microsoft.com/en-us/azure/lab-services/how-to-attach-detach-shared-image-gallery
In general, your deployment should be similar to my deployment depending on when and where you publish your lab:
- Created a Win 10 Pro template (finished within 20 minutes as noted in the portal)
- Published the lab with a capacity of 12 machines (finished within 30 minutes)