This is on tumbleweed with a Brother HL-2040 (black and white laserprinter), using driver Brother HL-2060 Foomatic/hl1250 (grayscale) connected via USB. "lsusb" sees it too. I know that there is a driver and wrapperdriver on the brother site, but installing those I get a message that they are deprecated and will not be supported at some time in the future, so I don't use them. My setup worked for years until about the beginning of August 2019 (I don't print often, so I am not quite sure, when the problem started).

The Cups interface says concerning the jobs e.g.:
pending since Fri 16 Aug 2019 03:28:49 PM CEST  
processing since Fri 16 Aug 2019 04:21:15 PM CEST "Sending Data to Printer."
What? How?? Where??? I don't even know where to look, and google disappointed me severely .