What is your Shotcut version (see Help > About Shotcut)? Is it 32-bit?
no
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.)
Your computer is probably over-heating or perhaps there is a problem with a driver or your memory hardware. If you suspect it is over-heating, see this:
There are memory testing programs you can find and run. I usually use one included on a Linux USB install boot media. Anyone have a suggestion here for Windows users?