I seem to recall you pointing out a figure from F&P which Fleischmann called the most significant event he ever saw or something like that. That was a sudden kick upwards in temperature. But as I recall it started before the external heating was taken away
There was never any external heating in the heat after death events reported by F&P, McKubre, Tian or Dardik. There was no internal added heat from electrolysis, either. All input power was stopped. (Except perhaps compensation heating with McKubre, which only keeps the cell at a fixed temperature of ~30°C, as I recall.)
Probably, the data you recall is from Pons et al.: https://www.lenr-canr.org/acrobat/PonsSheatafterd.pdf
Miles did report heat after death in a cell with input electrolysis power (not external power): https://www.lenr-canr.org/acrobat/MilesMthermalbeh.pdf
Mizuno's long heat-after-death event may have begun when there was input power, but it is only clear from the pen recorder trace after power was cut. Thermocouples with pen recorders are accurate but imprecise.