The headlines on March 21 told about how President Trump's security advisors had written "DO NOT CONGRATULATE PUTIN" across the top of his briefing but that the President congratulated Putin anyway. He was also instructed to admonish Putin about the poisoning of a Russian living in England.
The fact that Trump ignored this advice was painted as more evidence that Trump is soft on Putin and possibly owes his position to the Russian. When Trump fired his national security advisor a few days later, it was speculated that it was because the NSA had condemned Russia.Trump also shut down a Russian embassy and expelled 60 diplomats.
We don't know if the original leak included the nature of the entire phone call or only the factoid that Trump ignored the "DO NOT CONGRATULATE" with the implication that Trump was encouraging Putin. Certainly the person who did the original leak knew the full contents of the call. So either important details were withheld by the leaker or by the press. Either way it was fake news - news that put an entirely different spin on the call than what actually occurred.