Break the barrier is a gregtech-centered pack centered around the mass production of drills that generate resources, with the eventual endgoal of building a massive laser to shatter a barrier that keeps the player trapped within a dimension.
For whatever reason, lockdown freaks out and swaps the blocks that are generated each time pushes are made. This issue will only be fixed on main releases, as the dev branch moves too fast to warrent fixes this every commit. Prexisting worlds should be fine, however. More pack info can be found in /design/