In an elliptical orbit with a eccentricity very close to 1, turning on warp or quick load could teleport

I made a heavy rocket which last stage only has a single Ion Engine. When it's speed is close to the escape speed of Juno, the actual speed of it becomes much faster than the speed showed at the bottom of the screen. I turned off the warp, it's speed becomes normally. But when I turned on the warp again, the rocket teleported in a sudden. The closer the eccentricity is to 1, the faster the speed of warp is. I made the rocket to over 3 light years from Juno by this in a few minutes. Then I quick saved and quick loaded. When I quick loaded, the rocket teleported to OVER A MILLION LIGHT YEARS from Juno. (Actually the height shown on the screen Is overflowed, but I can see the real height when I clicked END FLIGHT button.) I made the eccentricity of the orbit closer and closer, the height of Apoapsis higher and higher, and I quick saved and quick loaded for several times, I reached OVER A TRILLION LIGHT YEARS at last. (I'm sorry that required thumbnail is empty because of I didn't get a screenshot like that when I flew. But you can also see my process with other screenshots.)