Where on earth is this Son Heung-min vs. other players story coming from?

The '96 line players didn't state the exact reason,
but they spoke in a way that suggested "things won't change."
Even when Kim Min-jae spoke, he just said the forwards aren't running enough.
There is no mention anywhere of any conflict between Son Heung-min and the other players..
Even after the match a few days ago, Kim Min-jae and Son Heung-min were seen talking and laughing together.
It feels like everyone is just talking based on random rumors;;;;;;