Crashing When Speeding up Audio track

I am using the newest version of shotcut Shotcut version 18.06.02
I am crashing whenever i speed up an audio track.
It will also have an audio issue when overlaying that audio track on to another audio track

I have a video summary what would be the best format to upload that. here?
f2p tier list.mlt (48.3 KB)

There is no way to speed up an audio track. You can change speed on an audio-only clip, however. That is probably what you meant. You lack many specifics: format of audio clip, the speed value used, “also have an audio issue.”

YouTube link