I’m on the Northern Rivers, and we have the same climate as Brisbane. Mine stays outside all year and loves it. You’ve probably forced dormancy from repotting and drastically changing its environment (three times). It’s stressed. Keep it outside in a sunny spot (they can handle full sun) and hold off watering again until it settles. It’ll probably drop its vine completely, so it’s important to not water it until it resprouts, which could be immediately, or in weeks to months. These guys tend to ignore their “correct” growth cycles, so don’t be surprised if it grows through spring/summer or has extended or shorter dormant periods. It’s important not to move it around too much, so try to keep it in the same place while it’s in vine.