Leads in Marketo are not syncing to SFDC; however leads from SFDC are syncing to Marketo. I discovered this issue a week ago when our Marketo form's email notified me that a new lead was created but I was unable to find the specific lead in SFDC. We have made no system changes in either SFDC or Marketo prior to this interruption, except for the Marketo subscription renewal. Our SFDC admin and I verified all settings for the linked user that connects SFDC and Marketo. It worked fine prior to this incident.