I was looking for an older thread on this but couldn't find it.
Please try to reproduce this:
In the playlist with a recorded audio, select a section, it doesn't even have to be in the middle, it can be at the end, and add it to the end of the audio snippet.
Even just resize the audio part to what you want to copy and put it somewhere.
Just fiddle around with cutting and pasting audio.
There will be a small slice of audio in between audio parts that will cut the sound off afterwards.
I resized the audio part on the left and moved the audio part on the right so you can see the snippet of audio in between. It's the small white vertical line.
Once the snippet is deleted the sound won't cut off.
If anyone has had their audiotrack sound cut off at a certain point this is why.