I was watching replay of epic defense of only 4 systems from full fleet attacks but at 8x speed from beginning as I didnt want to watch boring part.

In game I succesfully held off attacks until all other players eventually left one by one (multiplayer) and after last player left got victory screen. In game at one point I was under cultural attacks from neighbouring systems but eventually built up culture centers to counter it and went on with defense. But in replay culture attack overthrew all of planets before culture centers could be placed. After getting defeated (which didnt happen in actual game), ships continued to get orders from replay and moved around, some structures got scuttled as I was low on resources at the time, eventually game crashed and gave mini dump warning.

Pretty sure 8x speed had something to do with crash (incorrect culture spread simulation or something) did not try watching it in 1x speed yet because it takes hour to get to the point where its interesting.

Not sure how to upload minidump file here as it is not text.