Thank you for your consideration. This is super frustrating currently.

Additionally, there is a similar issue with "payment receipt" emails when paying a "mass pay" invoice.
If I add the total payment to a "mass pay" invoice, but tick the "do not email" box, when the payment is divided up and applied to the "child" linked invoices, all the "payment confirmation" or "payment receipt" emails still get sent out.

We had one customer get spammed by 20 "payment receipt" emails as a result of paying a "mass pay" invoice.