
Leebo's activation would cause the ship to be Ionized, Leebo's actions would never have occurred. Advanced Sensors lets you perform an action immediately revealing your dial. If you use Advanced Sensors to trigger Leebo's action you become Ionized, which prevents you from revealing a dial. Since you don't reveal a dial that turn, Advanced Sensors can't trigger to activate Leebo.
Though according to some theories, using Advanced Senors to activate Leebo creates an alternate reality in which the ship moves forward with as if doing a white one and gets to remove the token, and another reality where it does the maneuver set on the dial and resolves the Ionization the following turn.
Edited by WWHSD