IICptMillerII

Actually, I spoke too soon. It turns out I do still have the scenario file. I've attached it here for you. This is the final version of the scenario I ran, and features the Germans as Elite Fanatics with +2 leadership. In other words, their stats are maxed out. The result is the same, once off map artillery begins landing around them, they flee. Note, the artillery for the Soviets in the scenario are 82mm mortars. Its not even heavy artillery. 

Training Campaign Elite Fanatics.btt

No, but it is easy enough to set up again. Just unpack the Tutorial campaign from CMRT, add some artillery of your choosing to the Soviets, and dump it on the Germans. The Germans come in fixed fortifications on a hill, so its a perfect test template. You can very quickly see the issue in v4 if you drop arty on the Germans in their trenches on the hill. Caliber/training/leadership/morale has no effect. The infantry will always bail from the trenches as soon as a single round lands near them. If you want a link to the video I made I can provide that.