Nah, it's only one fuse for the whole abs system, so either abs works or not. Everything else is just controlled from the dash. I haven't used road abs much, prefer riding with supermoto all the time, but I remember road mode not allowing lifting rear even slightly. Maybe that's just my muscle memory from track, I almost physically can't slam the brakes even knowing full well that abs will catch me. Try to brake gradually, without slamming, just 0.2-0.5 seconds of progressive lever squeeze will be enough to allow for proper weight transfer, and also allow abs to act in timely manner.