Ringlead DMS Integration with SFDC Validation Rule

We have tried to integrate the new Ringlead DMS with Marketo and created a validation rule that allows the webhook to check for duplicates. However, sometimes the processing time takes so long that if the Marketo program is synced to a campaign in SFDC, it never updates the campaign status. (As mentioned in the thread here: https://nation.marketo.com/message/177744-re-help-understanding-ringlead-integration?sr=search&searchId=0fbffe2d-3022-45… )

Has anyone else found a workaround besides manually updating all the campaign member statuses manually? We've tried to work through with Ringlead's tech resources and Marketo support, but haven't been able to find a resolution.