I'm not sure I quite understand the question.
Are you getting an error that results in the retry?
Or is it after the "10 seconds" an error is being returned and the question is why does it take so long to return the error?
What is your PHP connection string?
Is a Connection cache being used?
Perhaps with the additional information we may be able to help suggest some changes to you, but I'm not sure the "community" would be able to answer any internal specific questions about the driver. An official support incident may be more appropriate