So, are you using a FlexiBMS and you have trouble starting your charging, if you first connect the charger to the battery pack and then to the wall, or was this just a demonstration of the behavior you described in the Noob question thread! 2020_Summer - #14003 by Athrx ??
The behavior on the video looks like the primary side (wall-power) of the charger doesn’t want to power up, as the secondary side is already reporting available voltage.
This though shouldn’t happen with the Lite, as the charger port is not connected to the battery, until voltage is detected on it after which the charging is started and that opens up the connection between the charger and battery side.