Only sounds mods I have are Charon Changes, Psi, Sounds and Ambience Forest. Disable both and still stack on same screen. I don`t think that sound is problem, because when I click on OK button when mission is finished, game starts to load world map screen, then freezes. Sound form world map was loaded and playing in background but screen showing last screen from mission where u can see what have u find from aliens, new stats for your soldiers is still on monitor. Only mods that I have installed are xce 0.34.2 and X-Division 0.99.33. Hope this clarify situation.