TrainCarts: Combined trains break apart after server restarting

English is not my native language; please excuse typing errors.

Info

Please provide the following information:

• BkCommonLib Version (/train version): 1.20.2-v1 (build: 1464)
• TrainCarts Version (/train version): v1.20.2-v1 (build: 1634)
• Server Type and Version (/version): git-Paper-280 (MC: 1.20.2)

---

Bug

Description

Combination trains running on loop lines will malfunction after a server restart. For example, carts will disconnect from each other and became a new train.

Before restart:

After restart:

You can see that some train got new children.

Steps to reproduce

Just restart the server and do nothing.