On April 1st, the MOHLTC implemented a new 45% MRP related to subsequent visits after hours.
Unfortunately there is an issue with how E084 was implemented on the MOHLTC mainframe and they are working to fix it as quickly as possible. Due to this issue, it's likely you are seeing that both the E084 and/or the associated service is being paid $0 instead of the correct value.
E084 can only be billed by non-surgical specialties, but for some reason, every doctor's services in the claim (including the parent) are being rejected because the Ministry System thinks that they are a surgeon (hence the S7 error code).
For now, the advice is to do nothing though please contact the MOH at 1-800-262-6524 if you want direct information. There will be a new bulletin posted soon with additional details, but as the claims are remitted they do not need to be resubmitted or have an RAI done. The Ministry has indicated they will automatically be correcting the payment on the next remittance once they figure out the issue.