Channel set import doesn't retain category parent/child relationships

[tyssen]

Description of the problem

Running a Channel Seet export from an EE site on 7.2.6 and then trying to import into the same project but using a different database imports everything fine except that the categories lose their parent/child relationship. Which is a big deal on this particular project because there are hundreds of categories.

How to reproduce

1. Export channel set from a connected to one database (same as the production version of the site)
2. Change the config file to connect to a completely fresh database
3. Import the channel set
4. Everything seems fine except parent/child relations lost from categories

Environment details

• EE version: 7.2.6
• PHP version: 8.0.22
• MySQL version: 8.0.16
• OS: macOS
• Web server: Nginx