Disabling the 'show transformation handles for selected nodes' option only works on groups of multiple nodes.
This is a problem both for cusp nodes:
and for smooth nodes:
This didn't happen when I first downloaded Inkscape. Does anyone have any clue what button I accidentally hit, or should I go to the bug reports section?
I wonder what the use case for this feature is? It seems like they ought to be disabled when the option on the control bar is disabled. I wonder why someone would want this feature enabled all the time?