So far I have found a couple bugs while scavenging.
1. It is possible to bug your speed if you hold forward while salvaging on a road. Your speed will remain the same as road speed while running on dirt or other terrain.
2. You can gain skill points in running while scavenging. Applying the same method above will allow you to simulate running while standing in place. No animation but the sound is still present. I have gained running skill points while scavenging bar and animation was going on.