I just tried it with Civil 3d 2017 and had odd results.
Starting a new block, when I run the parameters command, from within the block editor, with no parameters in the block, the ribbon moved down a couple of pixels but nothing else happened.
When I clicked on the parameters manager button, to turn the parameters manager off, the ribbon moved back up to its original location.
I added in a visibility parameter into the block and then ran the parameters command.
This time the parameters manager appeared but was docked in line with the ribbon (which probably explains the movement of the ribbon).
I was then able to undock the parameters manager and have it floating on the screen.
I then turned the parameters manager off then back on and the parameters manager palette reappeared where it was last placed.
I went out of the block editor and then went back into the block editor and when I turned the parameters manager back on it reappeared where it was last placed.
After closing Civil 3d and reopening it, I go into the block editor and run the parameters command, without any parameters in the drawing, and the parameters manager appeared in the location I last placed it.
Seems that having undocked it from the ribbon, the parameters manager palette is behaving as expected on my machine.
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Andrew Puller
Maitland, NSW, Australia
Windows 11
Intel core i7 11800 @ 2.30 GHz with 32GB Ram
Civil 3d 2023