I just discovered that in Better Anchor Links the Content will not display a anchor if the H tag has any styling applied. This can be a inline styling or one applied from the WYSIWIG/sink.
Now - a easy fix is to ofc delete all the styling. But I'm making a indication here to the developer to fix this bug whenever he can ;]
Better Anchor Links is still a great plugin but now a lay person might have some trouble with using it.