Existing plugin we used for printing individual orders invoices A-Z was not behaving; it would not allow me to print by Lastname A-Z for some reason, and defaulted to sorting by order date… which is odd because it didn’t used to.

After a half-day of troubleshooting, I decided it would be easier and best to swap it out with a newer invoicing plugin called Challan Invoicing PDF. It is accessible via Select All, then bulk dropdown > Make Invoice PDF.