Thanks, and glad the demo was fun.
I have not had a proper look at either of these yet, so I am not going to guess at causes. Both are written down and they are the next thing I sit down with. The outreach one has come up before and I still owe it a real answer. The overflow loop is new to me, and you have described it clearly enough that I know where to start, which saves me a lot.
If you still have that factory, a screenshot of the bit that went strange would help a lot, so I can see how the power was wired around it.