I personally haven't had any clients reach out about this, and I have a decent amount that were set for auto-debit on the 15th.

Some recommendations for the future:

1. Put in your (auto-)messaging that these transactions are ACH, which doesn't happen instantly. Taxpayers should not panic if it takes a couple of days to show on their bank side.
2. Clarify to clients that the IRS and states are like bickering step-siblings. What one does is unconnected from what the other does. The fact that a state withdrew funds (or sent a refund, for that matter), while the IRS didn't/hasn't yet, is an irrelevant data point.
3. Make sure your EL clarifies that your liability ends with submission of e-file. As long as you've verified the bank info is accurate on the front end, then it's on the bank/IRS/state. Of course it doesn't stop clients from calling and expecting you to solve it, but IF there is a bank/IRS/state failure to process in some way, that will help a lot in limiting your liability if any penalties are incurred and non-abateable.
4. Keep a list of all these clients raising a panic. Either fire them, or tell them that next year, auto-debits need to be set 10 days early to avoid this.