The CreateFormat column of the DataTypes collection did not contain a format specification for creating a new column type. (Bug#25947)

The characterset property would not be identified during a connection (also affected Visual Studion Plugin). (Bug#27240, Bug#26147)

When cloning an open MySqlClient.MySqlConnection with the Persist Security Info=False option set, the cloned connection is not usable because the security information has not been cloned. (Bug#27269)

If you close an open connection with an active transaction, the transaction is not automatically rolled back. (Bug#27289)