The display inaccuracy showing 4/5 bars was a known firmware-related bug, resolved in v4.0.1.
Despite this display inaccuracy only being a general representation of Orchid's battery level, the issue did cause confusion amongst users who had fully charged their unit.
What to do: To resolve this issue, head over to our firmware page and update your Orchid to the latest version. A full list of other features and fixes from v4.0.1 is listed here.