[CRITICAL BUG] Tradeable Player Status Flipped to Untradeable After Rank Up

​I encountered a critical issue where a Tradeable player card became Untradeable immediately after I performed a Rank Up action. Specifically, I purchased the

Marcus Rashford OVR 110 card from the Market for approximately 700 million Coins, confirming its Tradeable status. After using the necessary materials to Rank Up the card to Purple (Rank 3), the Untradeable symbol (🚫) appeared on the card, and the "Transfer" button became permanently locked. This contradicts the fundamental game mechanics, as a purchased Tradeable card should maintain its status after ranking, and I request an immediate investigation into this bug and a resolution for my card's trade status.