Summary of the problem Thermal Expansion machines lose upgrades and reset configuration Pack Version 1.1.0 What is the bug? When leaving the dimension or area that the Thermal expansion machines are located, they will sometimes reset to basic tier. They lose all upgrades installed and reset the output configuration to default. Mod & Version Thermal Expansion 188.8.131.52 Link to log file No log available Is it repeatable? Yes, place the machine, upgrade it and leave area/dimension a few times. Known Fix Don't upgrade thermal expansion machines .