Thanks! Would the Space Exploration beacons also cause this bug? I've noticed the copy-paste issue with that mod too.

> 1. Something disabled the recipe after you made the blueprint (in which case you will see a red disabled circle in the blueprint preview)

I can at least rule this out completely: the bug happens simply copy-pasting existing buildings with working recipes.

Is there something I can do while playing that would help you track down the bug? Would the log file immediately after I notice the bug happening help? Or a screen capture of the game, trimmed to around when the bug occurs? Of course I understand you'd prefer a clean bug with exact reproduction step...

Here is the save file: https://www.dropbox.com/s/73pqmrjkf86i0bq/nullius.zip?dl=0 I'd give exact, reliable steps if I knew them. Here's the best I can: 1. Load the save. 2. Wait a long time. May also require playing the game (moving around, building stuff? I don't know.) 3. Paste the blueprint at th...

See the screenshot here: https://imgur.com/rCG5Tgg All three rows of buildings are pastes of the same copied source. Notice that the fifth hydro plant on the top row is randomly missing its recipe; so is the distillation plant in the bottom-left. The blueprint itself is fine; all buildings have reci...