I don't think there are any other posts about this. Anyone else been getting some really big supply totals?
I was playing a game with three star systems. I got my fleet supply up to around 1200 I think just before starting into conquering the second star system.
All of a sudden I looked and saw my capacity was back down at around 700. My fleet continued to operate but I had to conquer half of that second star system to get my supply back up to match the size of my fleet.
I continued to conquer the second system - capacity got up to around 1400. Then it suddenly dropped back to around 900! I had to start building it up by conquering more planets again.
All the numbers mentioned are approximate. Unless you happen to be paying attention to the numbers I don't notice this straight away - the only other symptom is any ships you had queued up to build just don't get started.