In the last hand before the break, Andrea Dato opened to 155,000 preflop and it was passed to Kiryl Radzivonau who made it 315,000. Dato responded by four-betting to 630,000 and Radzivonau moved all in. Dato quickly called.
The board came and the Russian doubled up. Dato passed over the chips then left the table and Radzivonau began to stack them as they went on a break.
The PokerNews Live Reporting Team and Radzivonau both then noticed that he was short a full double-up. The all-in had been announced as 2,690,000 but Radzivonau only had 5,040,000. Counting the blinds and antes, the Russian should have 5,540,000 and was clearly 500,000 short.
The floor staff are currently checking the cameras but it does appear as though Dato did not give enough chips and the dealer miscounted what Radzivonau should've received. Since Dato is not at the table, they are waiting until the Italian returns before reviewing the situation.