QR code is showing 000000 when we use theme

https://forum.manager.io/t/ksa-qr-code-not-working-in-custom-theme/41299/46

The solution is here, but they will face another problem for which I have not found a solution
This happens when using [custom theme]
default theme It also does not happen that it is the date of creation of the invoice, which is the date that appears when scanning

time stamp on QR Changes without modification to the invoice