Polymarket said in an announcement on its official Discord that it had identified the situation regarding the forecast event of the "Ukrainian rare earth market". The resolution of this market goes against the expectations of Polymarket users. Polymarket said that since this is not a market failure, no refund will be made. At the same time, Polymarket and the UMA team will establish systems, monitoring, etc. after negotiation to ensure that this situation does not repeat itself. According to previous community news, a user tampered with the results of the "Ukrainian rare earth market" forecast event on Polymarket by hijacking the oracle UMA.