After a certain period of operation of the device Shorty Pen (frequent calibrations), malfunctions began.
1. After switching to left-handed mode and turning off the device, it is no longer possible to fully return it back.
Plus, calibration no longer works in this mode. At 8.2 Ohm the device turns off without making a sound..
The device does not turn off normally (there is no sound signal and turns off only after the button is released)
2. Also... if during calibration you press the save button with the probes open, the device freezes.
You need to turn off the device again and repeat the calibration process again. I noticed that different devices may have different glitches, but the meaning of glitches is the same - it occurs when information is written to the EEPROM.
The REASON seems to be an overflow of EEPROM or accumulation of errors in the EEPROM..
After reflashing the MK - everything is OK!