When was the save game started for anyone getting this ?
Does it happen in fresh new save games ?
Can you try deleting the playfield folder for the orbit (note the name of the orbit) & sectors.yaml that are in the save game so new ones can be generated:
steamapps\common\Empyrion - Galactic Survival\Saves\Games\SAVE GAME NAME\Playfields
steamapps\common\Empyrion - Galactic Survival\Saves\Games\SAVE GAME NAME\Sectors
Perhaps also backup the save game before doing this also.