Program enters unstoppable loop of increasing eccentricity when transitioning from elliptical to parabolic orbits

[Phim226]

If the true anomaly is set to 180 and the eccentricity is 0.999, then clicking the slider to increase the eccentricity to 1 will cause the program to enter an unstoppable loop where the eccentricity raises by 1 slider resolution point (which at the time of writing is 0.001) and the warning window stating that the state can't be evaluated at infinity is continually displayed. The only way to stop it is close out of the program altogether.