I didn't investigate this quest until well into my playthough (Well after encountering Eothas at Hasongo). I sided with the Bardattos and even though I volunteered to only kill Atello Valera, I ended up killing all of them because I'm an overachiever. I received by reward from Ezzali Bardatto and the quest was marked as completed. Immediately after leaving the estate, the game loads and the camera shifts slightly indicating that a scripted scene may be starting. At this point the screen sort of fades cursor reverts to the pointing finger. Nothing can be selected, no other characters appear, the cut scene does not play out, although the background music and ambient sounds continue to play.
The autosave file immediately locks up as described above. The manual save file is saved right before, one only needs to exit the estate in order to reproduce the event. Since these files and the output_log.txt are too large for this post, II will send a link to them.
The only mods I have installed are additiional character portraits that I'm not even using in this particular character/game.
Please let me know if you need further information.
Thanks!
