Alright, sorry about the issue, in hindsight it would be nice if that fix was included in today's little update, but it's only in the Beta 11 branch right now xD (it doesn't seem all that common in general, since I'm pretty sure the main cause is a Recycler stealing one of your autopaired parts and not only tossing it in a Recycling Unit but also successfully completing the full recycle process...) (simply having autopaired/swapped with a different part would stop the bug, too)
Anyway hey glad you've found what seems to be just the game for you! There's always a game or two like that out there for everyone
. I rather enjoy it myself, which is why I made it in the first place, and if you like this I imagine you'll love what you've still yet to discover, plus other things still to come