I'm not sure this will be reproducible. I hope I got the steps to create in the correct order. In case I missed a step or so, I was inspecting a large fleet and various ship classes. I clicked the [Upgrade] button on a tiny ship in the fleet and crashed to DT. The ship "might" have been a stock ship design. It is possible that I might have clicked from the Planet Shipyard window, but I think I was inside a fleet (it was about 5 AM local time).
- Was deep into a gigantic game.
- Clicked the [info] button on a fleet.
- selected a single ship from the fleet.
- clicked [upgrade].
Crashed to DT.