This issue is more noticeable the more there are fighters.
For example, with 4 shiploads of squads, the hickups can last several seconds.
What makes these hickups even more weird is they completely disappear when ordering the squads to return.
I have two /profile commands stats files.
One, while the lags occurred, and second when they disappeared after giving the return order.
I'm not sure how to paste them since they are over 60 megs each.