During their final test pass of the version 2.21 patch last night, the QA team uncovered an issue with deck validation that results in a low risk but high impact situation for server performance. We determined that releasing the patch without addressing this issue created too much risk, and moved the release date of this patch to Tuesday, June 24th. We believe this additional time will provide the team sufficient time to address the issue. We apologize for the delay, and appreciate your patience as we work to ensure a stable, fun gameplay experience for all.