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Not currently true, at least for React. https://github.com/facebook/react/blob/master/LICENSE

If I recall they removed that restriction from the react license.

(Further devolving into off-topic:) What I don't understand is why they moved from BSD+Patents to MIT, and not to pure BSD, by just removing the Patents file, which would be the obvious step?

I thought they cancelled your patent grants for a project if you came into a patent dispute with the project.

Also React was relicenced.

Before the relicensing it even covered things like you suing them for violating a non-software patent resulting in getting your react patent license pulled (can't remember if it was general react license pulled or just the patent grant, I think the latter).