Recently as Vasari Rebels, I launched an attack against an enemy planet with a Titan and a SB. I eventually decided to retreat and then I noticed something odd. The PJI was greatly increasing the time it took for the Titan to phase jump but was not effecting the SB. Also, there was an enemy SB in that grav well. While the Titan was charging up its phase drive, the phase window was red and the Titan took damage when it jumped. However, my SB had an orange phase jump effect and was unaffected by the enemy SB's phase destabilisation ability.
In short, phase jumping Orkulus are immune to both PJIs and phase destabilisation from enemy SBs. I'm pretty sure that this is not working as intended because it doesn't say that in the tech description.