I've recently been having a problem where I'll send a fleet to a planet to do something, and after they are there randomly 1 or 2 of the ships might try to phase jump back.
For example, I just started bombarding a nearby planet. I sent in 2 fleets and once they were there I issued them orders to attack. I went off to do something else for a minute, came back and noticed one smaller ship at the edge of the gravity well, I guess trying to phase jump back to the planet I sent them from. Anyone else had this issue?