Definitely need codes, but given it is intermittent and that no dash messages are displayed it is likely what Land Rover classifies as a “minor fault.” The most minor faults are ride height sensor failures. A single faulty sensor won’t impact any driving characteristics, but will throw an alert. Fault can be from wiring short or the sensor itself, both of which can be intermittent. Codes will direct you to which sensor it is, otherwise you will need to inspect every sensor and loom. Issues with the valve blocks can send similar codes, but unless the suspension module is calling for a height change I don’t think an issue with the valve block would surface. The height sensors are constantly sending a signal to the control module, whereas the valves just report being open or closed.
Definitely something to try to sort out, as multiple sensor failures will put you on bump stops.
Good luck!