Hi,
First, we do not support you or your hardware, so although this mailing list is a good place to ask for general troubleshooting, we cannot replace Flipkart and Amazon as first line of support. In the event that Amazon or Flipkart finds a defect with QZ Tray, they can raise issues to our attention for fixing in QZ Tray itself.
So to be clear, QZ will not fix this problem for you.
Thanks for offering these details, as well as using the TSC diagnostics too.
The symptom suggests that one of your labels may be modifying your printer settings. This may be perpetuated if the label was designed for another printer (e.g. Zebra) as the Zebra label format (ZPL) may not be 100% compatible with the TSC hardware.
If you wish, you may generate QZ Tray logs from both systems and attach to a new email to
sup...@qz.io.
There's no guarantee that these logs will explain what's happening, but we can take a look.
Note, this is a public mailing list, so anything you share to it will be public, including sensitive information from labels. For this reason, any logs files should be sent ONLY to
sup...@qz.io, where they will remain confidential.