When editing a mission using EDEN plus the MODs on this list (check the file UNSUNG Mission.html), then "Arma 3" crashes.
This has been recurrent only when using the UNSUNG mod.
I understand that UNSUNG is a 3rd party MOD and Bohemia does not give direct support to it but it is worth checking if this crash is not Arma side related.
"Arma 3" feedback report ZIP file:
(Task Edit) It just happened again: