Do you have a support ticket open for this? The error you show there is pretty generic and the actual use case is pretty unique so I would recommend opening a ticket with logs, and enough information to create a reproducible scenario here in Support.
Hey Patrick. Thanks for the reply. We haven't opened a support ticket yet as we have a workaround, but we will open hopefully next week.
Reminder for myself of how to replicate.
1. Allow extract to refresh on source site
2. tabcmd get from source site
3. tabcmd publish to target site
4. Try out web edit on target site, expect it to break