My son and I twice loaded up EF and selected Relic's map: "The Scheldt." We both chose Wehrmacht and selected two easy Russian AI opponents.
About 20 minutes in on our first try, both our systems froze with looping sound within about 30 seconds of each other.
On our second attempt, I chose Wehr and he chose PE. Again, about 20 minutes in (roughly), I froze with looping sound effects but he did not. He was able to finish the skirmish without hitch.
Just a heads up on an apparent bug.
As to our systems, both are fully up to date driver-wise as we constantly play online games - 7 days per week.
On a different map, Achelous River, I chose Wehr, he chose PE and we selected 2 Russian Normal AIs. No freezes or glitches.
Might be the easy setting, could be the Scheldt map... dunno.