I was able to numerically simulate an Earth sized planet that was temporarily stable in a habitable zone in a octonary system. The Earth sized planet was orbited by a moon, & the moon was orbited by a 4km diameter asteroid 33434 Scottmanley ( https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=33434 ), and asteroid Scottmanley was in turn orbited by the great pyramid. The Earth sized planet orbited a Sun sized star, outside the habitable zone of the Sun sized star, but the Sun sized star orbited within the habitable zone of 21 solar mass star Rigel, and Rigel was a distant binary of another Rigel. Each of the Rigels were orbited closely by a 1/10th solar mass Proxima Centauri & 2 Suns, for a total of 8 stars, an earth sized planet, a moon of the planet, an asteroid orbiting the moon, and the great pyramid orbiting the asteroid.
The system remained stable enough for liquid water to remain on the Earth sized planet for quite some time, roughly 10k Earth years. Unfortunately, after that period of relative tranquility an orbital perturbation made the planet's parent star drift too close to the overall barycenter of the entire system, which further perturbed & degraded the Sun's orbit around its Rigel sized parent star. First the planet froze with an average surface temp of -5F close to the overall system barycenter, then the Sun & its planet took a death plunge directly towards the very close vicinity of the Rigel sized star where the surface of the planet exceeded 1600 degrees Fahrenheit, & next the planet was stripped of the sun it was orbiting by a close pass with another star and then the planet was thrown clear of the entire system through a gravitational slingshot effect, though it retained its moon. Together the planet & its moon froze as they drifted away into the emptiness of space.
During the time that the orbits had remained relatively stable, the Pyramid had 6 different orbital parents:
Pyramid -orbited-> Asteroid -orbited-> Moon -orbited-> Earth -orbited-> Sun (1 solar mass) -orbited-> Rigel (~21 solar mass) -orbited-> Barycenter (~46 solar mass total system)
I've watched the whole thing. Universe Sandbox apparently doesn't account for variables such as radiation pressure, curvature of space, dark matter (which apparently is itself currently under assault)...
However, I really do appreciate the insight it can give us into some simulations.
Out of curiosity and theoretically speaking, if Earth were to be slingshot into space like in your simulation, would it be possible for another planet to "catch it" back into a relatively stable orbit, say by another Rigel? What about the slingshot speed? Would it remain constant throughout the voyage?