We are having an issue with engagement programs. Those who did not open the first email in a series were not delivered the next email, but instead seem to be stuck in a waiting step. We have opened a case, but this is a very urgent issue. The beginning of this Question on the Answers tab seems to be the same issue: https://trailblazers.salesforce.com/answers?id=9063A000000l65zQAA

We have tried pausing and restarting the engagement campaign. The only thing different from this one and those that are working successfully is that there are no exact dates for the sends - only # of days to wait between sends. Anyone seen this? Any way to fix it?