Went down to mine in mining dimension. Opened Journeymap. Game crashed and there was an NPE that seems to origin from Integrated Tunnels. Crashlog: https://pastebin.com/kYJp37jV
Reloaded and everything is fine.

Not sure if you get anything useful from this but otherwise just remove the issue.

Forge version 14.21.1.2443
Integrated tunnels version 1.2.5.
Integrated dynamics 0.8.4.
Cyclops core 0.10.12.