BrowserPrint - printer lost connection in usb



we have a computer with a ZT220 printer connected on usb. BrowserPrint is installed on the same computer. The application is a basic html page with the browserprint javascript file from the demo page.

It works but the status of the printer toggle permanently between online and offline. So sometime, we are unable to print because we receive an error "printer offline".

Do you have already met this issue ? What can I do ?

Thank you