In 2016 right click the part in the configurations tab...
in 2017, Where is the configurations drop down?
Restart your system/SW and check if that fixes it, mine is showing them in correct place. Also check on customize menu and make sure that options are checked.
check what are in correct place?
Customize menu only has the 2 items, collapse items and document properties
Sorry something mixed up. Could you check if you getting same behavior on other parts and assemblies?
Can you attach one model file to check?
Restarting cured everything in 2017
Retrieving data ...