I've put quite some effort into finding an answer to this particular question because multiple related posts exist, but they were about bugs that are said to be fixed by now. Apologies if this still is some duplicate post.

I have a pentapod egg biochamber that refreshes a pentapod egg on a timer so ...

The issue kept recurring and was incredibly hard to test for because you can't write a test for some logic which doesn't exist yet: you can't test something is correct until you've written it and if you forgot to sent the changed event you can forget to write a test that checks you didn't forget it ...

After reading the weekly updates for quite some time but never participating on the forums, this post finally made me create a forums account.
From the point of a Factorio developer, I would say that it makes me proud and insecure at the same time in particular made me want to express my respect ...