V-Core 3.1 PT1000 ADC out of range (toolboard fault, unknown cause)

I just finished a rather large print. When I was taking it off the bed, the extruder thermistor stopped working and showing the temperature is -255 degrees. I replaced the thermistor with another same PT1000, but it is still showing the same readings. After some investigation, I found the following readings were possible, but non within range:

PT1000 connected: -255 degrees
No thermistor connected: 878 degrees
104NT-4 connected: -252 degrees

I checked all the wiring and also did a power cycle on the entire printer and MCUs, but cannot resolve the problem. I don't know how can taking a print off the bed affect the thermistor, and the entire toolhead was untouched during it, or it can be just a coincidence. I would rather believe the bed thermistor stopped working since I was touching the bed, but the error says extruder. I have been trying different thermistors and configs with no luck.

Toolhead hardware:
BTT Octopus Pro main MCU, Goliath hotend, Orbiter 2 extruder, BTT EBB42 toolboard, Delta PFR0412EN-E part fan, SuperPINDA inductive probe.

printer.cfg attached.