Why can I place a combo bet on two eHockey matches when the same player is playing in both?

This is how the correlation check is designed to work. It is not a bug. Our correlated-combo check looks at teams. If two selections in the same sport share a competitor, the combo is rejected. In eHockey, each “team (player)” pairing is its own competitor. So when the same player plays as two different teams, those matches count as independent and the combo is accepted.