Maybe this is an OKlahoma thing! About the same time, I had a similar experience on he Chelsea Rt66 bridge. I maintained some control, but it was drifting a lot and about sent it into the bridge before I got it down. Later I flew it through the double lane iron bridge at Catoosa with no issues. From the two videos, it looks like the drones are drifting to the side they are closest to when they enter the bridge.