All software has bugs, but this software comes with important caveats.
Shotcut is an open source work-in-progress application which as I understand is mostly the work of one man as a hobby. I think being open source means that it’s open to other devs to help out.
The point to monthly releases is to add [or test] new features and patch critical bugs. Of course bugs can never be fixed if they aren’t correctly reported and are repeatable (it’s not a bug if it can’t be reliably repeated).
Users of Shotcut are essentially software testers, and you should be fine with that because it’s free and works well for the most part, but don’t use it for mission critical assignments or work for paying clients.
So rather than just reporting that you’re having problems, it would be better for you to follow the bug reporting directions and give the dev’s something to actually go on?
Here’s how to correctly report a bug (or bugs):