SuiteApprovals Approve by Email not being sent to next approver

Hello,

I have an approval matrix setup with approval rules that have multiple approvers. When the purchase order is created and submitted the first approver in the matrix gets an email where they can approve or reject by email. This works as expected, however, after the first approver approves the purchase order from the email, no email is sent to the next approver. If the purchase order is approved in the UI then the email is sent as expected. Is there a way to have the next approver emailed after the current approver approves via email?

Thanks in advance!

Norm