Since the first days of using Logic back in 2007 I've always thought this feature makes no sense, because it has no purpose on working like this and in fact creates a broken workflow. That is:
Let's say I have a channel strip with an EQ, then a Compressor and then a Limiter. If I'm mixing a song and I have all of those windows open so I can work on everything at the same time on multiple open windows, if by any chance I decide to add a Gain plugin BEFORE the EQ, now all my open windows change, creating a visual mess. Now my workflow is broken and I need to open the plugin that eventually disappeared and reorder all the windows again.
Is this still working this way after 10.4.6?
I honestly don't understand how Apple thought this was a good workflow and what the purpose was...
I mean, if I add a new plugin, all the open windows should remain open and in place and it should only open the new plugin's window, if that option is selected (to open a new plugin on insertion)