Spurious thermal runaway on bed with small slow printe parts and low temp bed

[martinpirringer]

To recreate - you might have to try a couple of times.

1.) Set bed to a temp of about 50C.
2.) Place small part above the bed sensor which usually is close to the center of the bed where the software places the part by default
3.) Print a Nylon or something similar at 290c with 20mm/sec speed.

The hotend will locally heat the bed. The software will turn off the bed but the temp will keep rising. At some point the pulse will throw "Thermal runaway Bed_0". Software should know that the hot hotend is over or close to the center and ignore this unless the bed temp goes above the max theoretical temp of the bed (whatever it is probably 100something)

Pulse C232 Garolite bed.

Temp. workaround - ,In slicer move small parts away from the center at least 2 in away from where Bed Thermistor is mounted.