What is your operating system?
Windows 10 (Education)
What is your Shotcut version (see Help > About Shotcut)? Is it 32-bit?
Can you repeat the problem? If so, what are the steps?
(Please be specific and use the names as seen in Shotcut, preferably English. Include a screenshot or screen recording if you can. Also, you can attach logs from either View > Application Log or right-click a job and choose View Log.)
Dragged this file from the Playlist to A3, slid the two buttons to add fade-in/fade-out
Now, I cannot hear these three clips in A1. Everything else works fine.
It fixes itself when I restart Shotcut though.