Just came across this small bug regarding panels in Grasshopper. If their wire display is set to “Hidden”, they will always show the connection icon even when they are not connected to anything.
Note the connection icon on the input of the panel
Highlighting all components shows their connection and reveals that the panel is not connected at all. Also that first data component should have a connection icon on the right side as well.
May I add that for a simple improvement of hidden wires it would be nice to show the icon on both sides and let us set the wire display by output as well. Its kind of strange that you can tell an input is connected with a hidden wire, but outputs don’t show anything so they always look like they are not connected to anything.
Thanks for fixing.