There are times when I will consider changing the focus of production on a planet.
Suppose I have 8 turns left in building a ship. I already have the military focus on. I consider
speeding up social production and so I turn it on instead. Naturally that increases
the time for building the ship. If I turn the military focus back on, the turns left won't
necessarily be the same as before. It may be 12 turns to complete the ship.
Am I being punished for looking at different options? Maybe it's not a bug but a feature.
I've seen this a lot though not all the time.