ZQ520 Mobile HTTPS POST printing fails.

Hi,

I have a few ZQ520 printers that are loaded with SSL certificates specified in the Zebra Printer Administration Guide page 48-50: https://www.zebra.com/content/dam/zebra/utilities/en/configuration/printeradminstrationguide-rev11-a.pdf.

This functionality works well for about 6-10 prints, when the "server" hosted on the printer crashes. This requires a restart of the printer to get HTTPS POSTS working again. If I try to POST to the printer after the crash, I get the Error "ERR_EMPTY_RESPONSE" in the browser.

Any Ideas?