The problem is not solved.

Here’s how it looks in my element explorer:

The issue is, deleting one, removes all the workflows, actions and everything connected to the other.

The two elements are carbon copies of one another, and selecting an item in one, selects it in the other.

The editor behaves in the most bizarre way and I’ve no idea how far back the issue appeared, but deleting them and starting again is a huge piece of work.

What on earth is going on here?