Thermal Runaway Error When Almost Done?  

Thermal Runaway Error When Almost Done?

Hadn't noticed issues before, but I updated to 6.0.2 a couple weeks ago and have had two thermal runaway shutdowns at nearly completed 20 hour prints - right around 99% or so.  After the first one, I checked extrusion on the extruder with the issue, which was fine, I replugged the thermistor which also appeared fine.  I did some other printing in between and more than 24 hours of print time since the first time... and the second one happens at nearly the same place (within a layer or two) of the same print (without one additional part far down on the print bed in the first sliced model), resliced and reloaded via USB.

Running a two headed XL with the 6.0.2 firmware and sliced in PrusaSlicer 2.8.0

Happens only at the ~98-99% level of a large/tall print, but happens there reliably

Has happened only on one extruder (this is the only one active in the finishing stages of the print)

Anyone else seeing thermal runaway errors pretty far along in the print?  There's some chance it's an intermittent fault, but that it appears to be happening exclusively in one position, I suspect it's a printer/slicer bug, but it seems to only happen in an annoying place.