PROBLEM: I am facing the same problem with four three laptops that run Manjaro KDE: after the latest stable upgrade the KDE battery indicator (located in the KDE panel) does not update the status when I plug and unplug the laptop.
acpi -i returns the correct battery status (Discharging or Charging). I am NOT facing this problem with the laptop that runs Arch + KDE Plasma. Suggestions are welcome.
EDIT: The solution (thanks, @philm)