EDIT: I seem to have solved the underlying issue. The probing is failing because the nozzle tip has too much surface area. I have noted previously that various nozzles work much better than others, if they have a aggressive cone with no or little flat at the tip. The nozzle on the volcano has a pretty big flat. Some very careful dremeling (with a painter's tape mask to keep bronze powder out of things) of the nozzle has solved the probing issue, so the crash issue is no longer triggered.
This isn't really a solution to this particular issue, more of a solution to the overall problem. It'd still be nice to see some better development of the TAZ firmware.
Hi there, I'm experiencing pretty much the same symptoms. The only difference in my case is that I'm using an aftermarket extruder designed to use the moarstruder firmware. (it's basically a e3d volcano on an aerostruder more or less). I have no reason to suspect the toolhead yet, but I'll be checking that with a multimeter etc just to be sure.
I get exactly the same weird thing in the logs, that Outsourcedguru noted, so I don't think it's a serial transmission issue, but instead something going very wrong in firmware.
I note that it's pushing a bit too much on the first corner during the bed level process then dies with the KILLED message on the LCD.
My current plan is to refresh the firmware just in case, check continuity of the nozzle to the pin connector to make sure I don't have a bad contact circuit, and then start delving into marlin firmware, but since I'm not really a coder I'm hoping somebody else manages to locate/kill the bug while I'm doing all that...
I'll grab a fresh log to post at some point in the process if I can, but when I first looked at this it was exactly the same. (and of course I can't find wherever I put the original log file since it's been two weeks).
Hope the data point helps though.