Lost and defeated militarysites don't match up

Screenshots

I checked the replay, not entirely but I found the issue.

35:50 Blue attacks red and conquers the sentinel. 1 defeat for blue, 1 lost for red. At 37:21 blue destroys the conquered sentinel. Stats are 2 defeats for blue, 1 lost for red and 1 lost for blue.

This one can be easily reproduced:

Destroy a military building while it is under attack.

- Blue conquers a building from red.
- Red attacks the building blue just conquered
- Blue destroys the building while under attack.
- Blue gains 1 point in defeated and 1 point in destroyed
  military buildings
- Red gains no point.

This only happens when destroying a conquered building, that's under attack. If red had destroyed the building, while blue was attacking, none of the players would have received any points.

From my point of view the question is how hard is it to fix this and is it worth having it in b20.

I wonder why this is targeted to build 20 anyhow...

I did that to make sure that we look at it. Retargetet to Build 21.

Migrated to https://github.com/widelands/widelands/issues/3390