Running stock Ender-5 PLUS V1.70.1 BL-Touch and Octoprint 1.4.2 on RPi 4B 4G.
NOTE: Issue only appears when there is an SD card installed.
ATTENTION: It happened once that the target temperature was set, the printer did turn on the heater, EXCEEDED the target temperature and reached 115C before the user panicked, unplugged everything and started externally ventilating the 3d printer. This should NEVER happen.
When using Octoprint and there is an SD card in the printer's SD slot, after init and connection, sending M140 S60 does NOTHING. The printer recognizes the new setting (updates the target temperature) but doesn't turn on bed heating, it eventually times out not being able to reach the target temperature.
Once the SD card is removed from the slot and the printer is power cycled, the same command starts working.