I also have the same problem with my S5. Is the development team working on this issue?
I'm pretty much stopped using wireless altogether because it is unreliable. I'm fortunate that my printer is close to my Apple wireless router so I can use the ethernet cable, but that means I could not move the printer without significant wiring hassles. Also, while more reliable than wireless, the ethernet connection itself cuts out on occasion, especially after a long print job.
When I try to re-engage the wireless connection in the printer's settings menu after it has cut out, the two way button on the touch menu does not change over to the on, blue position.
Do you mind if I send you my log file? If so, should I download just after an error occurs?
Kevin