Maybe I missed a paragraph but did you try a new temperature sensor?
That would seem like a logical error source for me when the reported temperature does not match the actual result. Or maybe there is an issue with the thermistor calibration? Is the thermistor type set correctly in your klipper config file?
How would you rate your Voron for regular maintenance and calibration requirements? I got started on an Ender 3 V2 which I have tinkered a lot with. At some point I lost the fun in with the constant tinkering and calibration and simply want a printer that once built is rock solid and relible.
Typically I would say prusa printers fit this requirement but at the same time I really like the amount of options that my klipper installation gives me. Also I kind of want a cube style printer to allow for an enclosure with air filtering which would lock me into the prusa xl as the only choice.
If a Voron is mostly maintenance free it would be a great alternative for my requirements