Minecraft Version

1.12.2

Forge Version

14.23.5.2847

Mod Version

1.12.2-0.11.7-375

Describe your problem, including steps to reproduce it

Moving compressed block via piston into position currently taken by heatsink causes crash.
This will cause repeated crashes on world load.
https://gist.github.com/Sakata-MC/77b16009c4d8caaf7fbbfc943ab8c66a#file-gistfile1-txt

I can't reproduce this. Any chance of a screenshot/video?

This is what I tried, no crash: https://youtu.be/GcgkWfyUR6I