Once an assembler need to regenerated but fails to get enough nutriment and dies, a ghost is put to rebuild it.
However, the ghost does not have the modules previously installed, meaning if an assembler dies due to nutriment shortage, you'll have to put back modules manually.
It also seems that modules are destroyed, which is whatever, but disincentivise to put high quality modules. However, this is a design choice and does not necessarly need to be fixed. It could be highlighted in the tips regarding bioassemblers.
