Audio sources that use a custom volume rolloff curve are playing for a split second at distances where they should not be heard. I also suspect the same issue is causing some audio sources to cut off the beginning of the sound. This issue has been there for years now and causes some very annoying issues like in the video below. I have the settings in the picture that cause the issue.
This issue can be easily observed in my Instagib Tournament world by starting a game with bots and then respawning.