It's happened on my multiserver.
Major changes in server.cfg I remember to have made
SECTOR_SIZE = 10000
PLAYER_MAX_BUILD_AREA = 1000
I confronted this bug first time when I created a test ship specially in order to test power generator design and when I received conflicting datas while the power generator design was strictly identical.
That how I noticed my alone ship core generated 2836.7e/s and my //Mass//, my //Blocks count// and my //Total rotational potential// were messed up. Furthermore I was unable to delete the ship core. So i use an admin command to delete. I recreate a ship, and the same bug occured. The energy generation is real and usable and the Total rotational potential really affected the ship (the alone ship turned really slowly like a huge ship)
I looked for to that hypothethic last "ghost blocks" but they had no physical rendering ingame I wasn't found them. The core was the last block alone but Starmade simulate/count that ghost blocks.
I was able to reproduce it in 2 different sessions on that same server (see step to reproduce). I tested it with Z 1000 line, X 1000 line and then Y 1000 line and all cases reproduce exactly the effects described below on pictures.
I tried Z 100 and Z 10 but no anomalies occures, I don't know the precise minimal amount it would affect and produce the bug but 1000 suppose to produce it for sure.
{F6245}
Above a screen of a normal core before the manipulation. Default stats underline in green, keep it in minds to compare with the next results.
{F6247}
Here the result after add 1000 Z power generators blocks behind the core with advanced build mode and remove it by use UNDO button. The red underline stats changed and are now the **new** default base stat of the ship. That's mean if rebuild things on that core the stat results won't be the same that the same & strictly identic ship design but on a fresh new spawn core.
{F6249}
Here the warning message when I attempted to delete the core. Core is the last block but SM trust the contrary.
{F6250}
Strange fact is also something seems randomly reseting or draining power. Here I just exit and re-enter right away and the power was dropped to 0 and start refilling.
As a matter of fact, I switch my installation path in order to try in Single Mode on a another world. I updated to 0.19556 and switched PLAYER_MAX_BUILD_AREA from 100 to 1000. And there nothing happen.
When I came back to my multi-server installation path and try it during a 3rd session it hadn't happen. So I'll looking for the future ones.
Here the logs from my 2n time occurrence (2 test sessions), the ship is named "Ghost".
{F6257}, {F6258}, {F6262}, {F6264}
{F6255}, {F6256}, {F6261}, {F6263}
Here the logs when I retry after my switch from single-mode and came-back to multi and it didn't happen :
{F6253}, {F6254}, {F6259}, {F6260}
{F6265}, {F6266}, {F6267}, {F6268}, {F6269}