The UN resolution condemning the Israeli settlements passed by the security council thanks to the US abstaining from the vote. A few days previous, Trump spoke with the Egyptian president, who then cancelled the original vote that his government called. A coalition of nations reintroduced the resolution after.
Last week’s controversy with China over an underwater drone. Trump again contradicted Obama’s policy publicly.
Not to mention the courtship between Putin and Trump. All and all, these situations are traditionally unheard of because the president-elect doesn’t attempt policy before the official transition on 1/21. The simple reason is we only have one president at any given moment. Trump’s win doesn’t change the constitution. I can’t imagine he will want his successor undercutting his final months but maybe he isn’t worried about that day coming.