[1.24] Impossible "sink 2 ships" mission

[nobody]

This started out as an occasional thing, but in my most recent war against Russia no correct mission of this type was generated, but a dozen or so wrong ones.

Description
I have the "Sink 2 ships (any)" gain 16k points mission.
I know that in the past I failed this mission because the sunk ships were too far (>50nm) from the target area (big red marker on the map).

Bug 1:
After observing a couple ships sink, I receive the message that I fulfilled my objective, but in the post battle results screen I fail it anyway.

Bug 2:
No target area exists (no red maker and the map isn't centered/moved when I double-click the objective).
No matter how many ships I sink, I always fail the mission.

Bug 1 and 2 can appear in the same battle.

[williammiller]

nobody - If you have a save game showing this issue (i.e. after it the 'you have succeeded' announcement but before the actual end of the battle) it would really help us to track this down.

Thanks!