The entire XLibre debacle seems like the most obvious example.

So because the maintainers of Xorg does not want patches that causes regressions Gnome makes people fork projects somehow?

I said

> the freedom to fork is one of the essential freedoms of FOSS. Many people in certain organizations (cough GNOME cough RedHat cough) don't seem to get this."

and you asked for examples. XLibre is a fork (of XOrg); people from GNOME and RedHat have spoken publicly to object to the fact that the fork exists (along with more generally expressing opinions that I find incompatible with my understanding of FOSS). The GitHub for the project has a wiki page (https://github.com/X11Libre/xserver/wiki/Are-We-XLibre-Yet%3...) tracking what Linux distributions do or will include the package; several prominent developers were found (https://github.com/X11Libre/xserver/issues/346) to have defaced this page by referring to the developers in very unkind ways. Among these was Jordan Petridis who is part of GNOME as well as XOrg and wrote extensively about the effort to remove the X11 GNOME session (both on a gnome.org blog and on social media), making many contentious claims about the XLibre developer in the process.

For more, I'd have to put in considerable time collating information, or else you'd have to follow sources that I have found are better not to mention in places like HN because doing so would attract too much drama. But I only make comments like these on the basis of what I can independently verify.