Stalling executing a queue

[Gorofin]

Please check the 24th Fleet, the Supreme Onslaught.

The fleet's status is (no mission)(+1 queued missions) but it seems never be executed. At least not in 1-2 month.
The problem itself is reproducible. But after loading the save, the Supreme Onslaught is jumping away. In the original play it moved in that direction, without jumping.
I have no clue why the Supreme Onslaught is going for a target on manual mode I never gave.

I do not have a save, where the queue before is saved.

My understanding is, that after finishing executing an item of the queue, the next item should instantly be selected.
That seems not the case, I saw (no mission)(+x queued missions) often.

BTW: Queue via Shift should work for the "Ship/Fleet Info"-Buttons, e.g. "Refuel and Repair", "Load Trupps", "Retrofit" and "Retire", too.

Edit:
I am using 1.3.1.1. The Problem seems to occur often (now?), not only in that fleet.

[MaximKI]

Thanks. We'd really like a save from before you notice this, if at all possible. We will investigate this issue.

What was the fleet's original order before the bombard queue order?