This is not a bug. Working as expected. The descriptive post has either been lost or goes back to the mailing list. Basicly you need to create a dedicated TG to assign recieve ship production. Most veteran players have seperate TG's for shipyards and fighter factories. Use one if the many means of transfering ships while leaving the construction TG in place.
So, it is seriously WAD to allow the player to spend BP and minerals and time building a fighter, then have that fighter irreversibly be lost AFTER the BP, time, and minerals are expended?
Hmmm...
Why is it that the first fighter built automagically creates a new TG to house them then? That must be broken, if the design is to not put fighters into a new game-created task group.
So I should amend my bug post to say:
When you first create a fighter the game creates a new TG to house that fighter when it should actually instead just destroy the fighter since I never actually created that TG. Same goes for new warships, the 'Shipyard TG' should not be automatically created.
EDIT:
And Orbital Habitats, and PDCs too...
Actually, the OHs must seriously be bugged then too, since I have always seen the game automatically create a new OH TG when I build one and then absorb or join it into a different TG...
EDIT2: (hopes the sarcasm is apparent)