If I have a fleet of 30 ships in a star system, and I tell them to jointly phase to the next star over... If a new ship is added to the fleet before it gets a chance to phase, the new ships always plots a course directly alongside the lead ship. This results in a bunch of ships getting "bumped" and the phasing is delayed until all the ships are ready to go.

It seems like you guys thought of this as a potential problem, because even with joint-phasing enabled, the ships only wait so long before leaving the stragglers behind.

It's quite frustrating, however, when you are trying to do a precision-timed run. It can delay phasing by a minute or two.

Suggested solution: Don't have ships plot courses to locations that have or will have other ships in them.