Broadcast through Guide with Lightstream Destination (Already reported through Console)

Hi there! Console direct full-time Mixer streamer here.

As the others have said, unfortunately, there is no native chroma setting for a green screen unless you are using an old Kinect camera.

However, if you can only stream through console and not through a capture card, Lightstream is working on adding chroma to it. Lightstream is currently in beta and only available through Mixer PRO currently but that might be an option once they go full launch.

have you enabled the option to send your stream through lightstream studio?

That can cause delays at times and have seen it cause these issues, if so try disabling it and seeing what happens

''In order to report problems through your Xbox console, you’ll have to download the free Xbox Report a Problem app first. This is one of the best ways to report issues to Team Xbox, since you can do it directly through your console.

Press the Xbox button  to open the guide, and then select Store.

Search for “xbox report a problem” and download the Xbox Report a Problem app.

After the app has downloaded and installed, follow the instructions below.''

Well this is where it can get technical for example you broadcast while the console is classed offline if it's going through a capture device and broadcasting via a PC but that is one method.

This is frustrating when it happens in any game. The best thing you can do is to report and block them through Xbox. You could also try contacting the developer through their own forums. They may be able to guide you through their report process.