That's my pet peeve with Strava. A lot of the steep climbs in my area are fed by downhills. There are some KOM's where the leader took multiple attempts at ramping up and beginning a 16% grade at 25+ mph to get the highest entering speed possible.
I suggested to Strava if you could have a KOM based on a 0 mph start of a climb to negate the benefit of a downhill. It's not going to happen since every KOM would have multiple times.