Greetings! I think I have a bug report for you.
In the attached save file, I started a new battle from the main menu. I chose a survey ship with Jellymen. There is just one Jellyman for such a small ship. When I kill the Jellyman, the mission does not end automatically (none of my units are wounded). So, in the attached save file, you can click the button to end the turn, and you will see a segmentation fault.
If the bug is fixed so that the mission ends as soon as the last Jellyman is killed, this save file may not be useful because I saved during this small window of time which should not exist (between last alien killed and end of mission). I have attached a screenshot of the battle options I used, and the mission is very short, so maybe it won't be so much work to check that the bug is fixed by starting and finishing a new mission. Also, I have made NO changes to the default OXCE+ mod options (the ones visible in the OPTIONS from the main menu).
EDIT: I made another save file where the Jellyman is about to be killed (not dead already). Also, one unit is wounded. Maybe this save file will be more useful for debugging.
Thanks for looking!