Ignoratio elenchi
Similar to ignoratio elenchi, a red herring is an argument, given in reply, that does not address the original issue.  Critically, a red herring is a deliberate attempt to change the subject or divert the argument. This is known formally in the English vocabulary as digression which is a neutrally connotated "Red herring".  The actual problem is eclipsed by the process of re-focusing on something else.