Weird a 75 mm shell goes first through the engine block, crew and passengers' compartment before anybody is wounded or dead. The AI plans need some Standard Operations Procedure. Just waiting on the top of the hill. I am afraid once again it is like shooting cattle in the paddock. This has nothing to do with the person who designed the scenario, nothing but kudos to him or her. After 20 minutes funny things are happening, and the editor just can't deal with human attack plans.
PS the Sherman spotted just fine, he was forewarned and had the tentative contact before he moved to contact (Hunt).