Parent Takeoff Copies, but Child Takeoffs Are Missing

Hello!

Has anyone experienced an issue where copying a takeoff folder only copies the parent takeoff, but none of the child takeoffs?

I noticed this happened to one of my projects. I normally copy takeoff folders from a previous project, and this is the first time I've encountered this issue.

Has anyone seen this before? Was it a server issue, cache issue, or is there something else I should check?

Thanks!