Modpack version
1.24

Can the issue be reproduced?

Issue
Integrated dynamics/tunnels not keeping labels on server restarts.

Probably something screwing with world saving in server shut down, but not dug into it yet to see if I can isolate which mod is the issue.

I have a feeling this will be solved when I update the Integrated Dynamics mods, but we'll see :)

Should be fixed in the next update, but not 1.25 sadly.
https://minecraft.curseforge.com/projects/integrated-dynamics/files/2693691

Minecraft CurseForge

Integrated Dynamics

IntegratedDynamics-1.12.2-1.0.11.jar