In short:
The revelation of a transfer to South Korea of two North Koreans caught fighting for Russia has sparked calls for a full apology.
Seoul has accused Ukraine of making the announcement in breach of a non-disclosure agreement regarding prisoner of war transfers.
Kyiv says it has only stated the fact of their transfer.


Maybe a mistake, maybe done deliberately. We don’t know yet what the cause is, just saying that there is also a chance that South Korea pissed off Zelensky, by not providing something they agreed to. It is all a political game in the end.