This admittedly is a fan-created scenario from steam workshop (bie's D Company coup-de-main), so not sure whether it's supported per se. But posting in hopes this would end uncover something useful in the core game. I'll keep an eye on it, but at the time of the crash I has 3 different platoons selected and tried to assign a defend order.
I am running steam's beta version
I am running steam's beta version