This issue is now fixed for me.
I started having this issue just after changing both the drum and the toner cartridge and updating the latest printer firmware for my HL-2280DW. I did not know which of these changes initiated the problem.
The printer was showing offline on the network. It would remain in deep sleep, with its switch still ON. Switching the printer OFF, wait, then turning it back on, the printer comes back online, visible from the network, and restarted printing.
The final step was to update the firmware of my router. After everything was up-to-date, the macOS bonjour connectivity is back. If I print while the printer is in deep sleep, it takes longer than before, but it eventually wakes up without needing special attention and starts printing again.[br]
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