I decided to throw some asteroids at the sun and got some strange results. The asteroids that I was using were Ceres and Chariklo in the Powers menu, though I wonder if this would work with any such asteroid.
After impact, some Sun Fragments made of 100 percent iron with very high masses and velocities were flung into space. I have a screenshot depicting the properties menu of one of these fragments as well as another bug: when I clicked faraway objects (like these fragments; they were near the orbit of Sedna by the time I hit the pause button) the objects would visually inflate to disproportionate sizes. I'll attach a log file of me replicating this bug as well, though I took a cursory look at an earlier one from this bug and didn't see much.
Screenshot and log should be attached.