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?
Add some of video track, then move one clip to another track
i often edit a videos for school which need for like 20 students or more, and everytime i move a sliced clip, it always delayed for 6 up to 7 seconds. I tried on Desktop (Ryzen 5 3600 (16Threads), 16GB, GTX1660 Super, SSD 512) and Notebook (Ryzen 3 2200G, 4GB, Vega 8 (onboard APU), SSD256) and both are the same. i also tried turn on Pararel Processing and HW Acceleration ON. still no luck.
i dont know whether this if this is intended to be like this, or this is a bug on thread managements? or i just missed some steps?