Why my major reconstructor did not reactivate?

[limsky]

your class 3 vs enemy class 3: V ^
you:
28 cruisers
enemy:
5 cruisers
10 dreadnoughts

25 cruisers vs 5 dreadnoughts
2 cruisers vs 2 cruisers

10 dreadnoughts emits shockwave
5 cruisers vs 5 cruisers
10 dreadnoughts vs 10 cruisers

losses:
you :
15 cruisers
enemy :
2 cruisers
5 dreadnoughts
score in this subbattle: 1095
------------------------------------------------
your class 4 vs enemy class 4: V ^
you:
1 mothership
1 major reconstructor
enemy:
1 mothership
1 shipyard
1 research center
1 major reconstructor
1 transwarp-network
1 defensive array

1 reconstructor reactivates in class 3: 6 ships
1 defensive array defends in class 3: 1 ship

losses:
you :
1 cruiser
enemy :
-
score in this subbattle: -1680

[We are Bjork]

All your ships were hit by the dreads shockwaves.
So their score was >0 so therefore could not be reconstructed.