They’ve always have had a leftist bias like most of big tech.
https://x.com/therabbithole84/status/1957598712693452920?s=4...
replies(3):
https://x.com/therabbithole84/status/1957598712693452920?s=4...
Not seeing anything in this source that supports this language; they summarize no other sources that I could see, and their own conclusions are more complex than this (as covered further down the article.)
I think that the one who previously introduced the phrase should have either not stated 'Multiple studies' or provided information about other studies. I suspect that a single research is usually not enough to be mentioned in an article[1] https://en.wikipedia.org/w/index.php?title=Ideological_bias_...
[2] https://en.wikipedia.org/w/index.php?title=Ideological_bias_...