Cerise stops working or becomes unreliable when my iPad battery reaches 100%

This is most likely due to the hub/splitter being used that doesn’t support USB PD FRS (Fast Role Swap) which means when the iPad is fully charge and stops sinking power and turns into a power source the splitter doesn’t properly switch mode and needs to be restarted. A simple plug/unplug should fix the issue. We recommend not using the splitter when your iPad is fully charged.