All was working fine in K2 5.5, but after upgrading to v5.7 we have noticed an immediate problem:

When a Workflows sending an Approval request, the approval replies with Approve/Decline, but the workflow is still sat saying Active as if it hasn’t even received a response.

There is nothing obvious in the logs, so it seems something has broken Smart Actions with Outlook  when upgrading from v5.5 to v5.7

Any suggestions on fixing this?