I have reverted to version 21.0.392 because the update has made the option copy function unworkable and very frustrating, normally to copy something I hold done the option key and drag the object to create a copy or multiple copies, in the new version this is not happening, I have to depress the option key twice to get the copy and if I release the option key it disappears. Not good to break what has always worked.
The copy/move modifier key has changed to a toggle, instead of momentary press and hold. Press it once to change the tool to a copy/move, press it again to change back to move only.
You might want to read through the Release Notes to see what else has been added or changed.
Have a look at this released on the upgrade day, it covers the changes to the copy feature well.
