Not really. By definition -a means "active window". There is only ever 1 active window and that is the one you're looking at.
Typing /scon -a echo -a hi will return N results in the same window, N depends on how many connections you have open. They're all echo'd to the same window because it can only echo to 1 window, the active one.
It's not really a bug, the original command could just be interepted to work in different ways.
