Why does the breathing light of the Xiaomi Vacuum Cleaner G20 Max flash without displaying the battery level while charging?

When the battery level is very low and the vacuum cleaner is charging to replenish it, the breathing light will only flash without displaying the battery level. Please be patient until the battery is sufficiently charged to a safe level, at which point the battery level will display normally. This phenomenon is not a malfunction, so please continue to use it with confidence.