The crews were not suppressed. They hadn't even been fired on when the first T34 passed in front. In fact, they didn't take incoming until after I told them to take out the 2nd T34 two turns later.
I'm replaying the scenario and the 88s (in about the same position) opened fire on the first squad that they saw in the woods. (The T34s, on the other hand, refused to wander into the fire lane that I'd created.)
OTHER MEANS, thanks for the print screen tips. Hard to believe I've ten years of PC support under my belt.