I bet the reason they are investigating is because of multiplayer. No other explanation for why something as inconsequential to the single player experience would be getting valuable developer attention when there are far more visible and deleterious bugs still affecting the game.
Its not inconsequential to the single player experience. Item/mod type not randomizing correctly is a very serious bug and it was good that they reverted it back to the way it was in 1.06.
If you know of a more deleterious bug that the developers are not aware of, then you need to make a thread about it so we can verify it, then submit accurate bug reports. Who would have thought that if you submit bug reports that aren't vague, false or misleading, devs can hotfix really fucking fast?
If you want things fixed quickly you can't just moan "x isn't working. plz fix". How is not working? How you do think it is supposed to work? Is it reproducible? Can you post screenshots/video to show it? Can other people do it to verify your observations?