Anyone seen issues with the dunning bundle? Seems like we're not evaluating all customers we should

Yeah, our collections team has reported having problems, beginning about three weeks ago. We don't have the volume of customers you do, but they're estimating roughly 10-15% of customers aren't getting letters sent (email). We've documented a few different scenarios, but the bottom line is that they have to check and then uncheck the Pause Dunning in order to get it to kick in. I am opening a ticket with support as soon as I can find the time.