Interesting. I opened the file with WavePad instead of switch, and then just saved it as an MP3. This did not cut off the audio like Switch did.
It seems that this is a problem with the way Switch converts it then, because WavePad uses the same "converter" but it is working.
Is there anyway to get switch not to cut off the audio without adding silence in front of the track? It is much more cumbersome to use WavePad for many conversions than Switch.