Octoprint disconnects on Errors, despite changing settings


What is the problem?
When I get a Heating Failed Error, Octoprint disconnects from the printer, despite having set the option under Serial Connection -> Behavior -> What to do on a firmware error to "Cancel any ongoing prints, but stay connected to the printer".

What did you already try to solve it?
I have tried changing the setting back and setting it again, then restarting the Octoprint service. I also rebooted the device Octoprint is running on.

Additional information about your setup (OctoPrint version, OctoPi version, printer, firmware, octoprint.log, serial.log or output on terminal tab, ...)
Octoprint Version: 1.3.10
Printer: Homebrew Prusa i2 style
Firmware: Marlin Release 1.1.9

I am aware that I need to modify my firmware settings to stop the printer from erroring out, but I would also like to be able to use the Octoprint option to not disconnect from the printer, when this happens. That option does not currently seem to work.