What is your operating system?
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.)
Create a project, add a video file and two images on separate video lanes, add an audio track and put some sound on that, add a filter for resizing and positioning to both images, save the project and export it! Proxies are turned on. Now, create a new project, open a video file, copy it to playlist and from there to the timeline and you experience the crash!