You're fine, that's good info.
What's actually happening is that you're accidentally targeting yourself; the icon is invisible because it matches the target's color. So clearly I need to adjust the input system and/or make the instructions clearer.
I’d be interested in checking out a new build. It seems like an interesting concept.
New build's up if you're still interested.
(I'll delete this comment after a while... this is the kind of thing I'd rather DM about if we had that here. :shrug: )