I can't tell which cause it, but sometimes upower does not notify that adapter is unplugged. A minute after
upower -e
/org/freedesktop/UPower/devices/line_power_ADP1
/org/freedesktop/UPower/devices/battery_BAT0
/org/freedesktop/UPower/devices/mouse_dev_E5_5C_01_F0_0D_83
/org/freedesktop/UPower/devices/DisplayDevice
upower -i /org/freedesktop/UPower/devices/battery_BAT0 | grep state
state: charging
It's need a rebuild or some patch, it starting a month ago, but it's not happen every time. My battery reduced its capacity since then, i wonder if that damage can cause it.