I do not find any applicable reason of them disappearing at all. Hello. Why would one want their work vanishing into thin air whence they applied them?
It’s hard to fathom how the developers can sit round a table and come up with the idea of not showing automation nodes always, or at least there being an option to show them or not.
It is exactly these kind of unrequested, unexplained and puzzling changes which cause such frustration and inconvenience.
For my part, I cannot imagine a situation where would I not want to see immediately whatever automated parameter changes I’ve just made.