What are your computer specs and are you running it on Windows, Linux or Mac? Can you also give the MediaInfo for the file you are using? It’s strange that you are experiencing this as 1080p because I’ve only had this happen on 4K files when using Shotcut.
Here is a post to make clear on what kind of info to give when reporting issues like this for future reference.
And for the crashes you say are happening for you, there is currently a beta version that is for testing before the release of the next official version. Download it here and test it out to see if you are still having the same issues and if you are then report the issue there. Don’t make a separate post about it.