Do you have still this issue? When issue still happen, so please upload files from this folder: C:\Users\<Name>\AppData\Local\Arma 3 Alpha\
When package will be smaller than 2,097k, so you can attach here. Thank you.
http://feedback.arma3.com/how-to-user.html.html

Wrong severity changed. major>crash

Closing due to lack of info / response in a long time.

If this issue is still reproducable for you, please create a new ticket for it and make sure to include all necessary information (files etc.).