Selected unit arrowarrow doesn't (seem to) count floatHeight ?

[robin]

  - type: STR_ROBOSPHERE_XCOM
    [...]
    standHeight: 10
    floatHeight: 10

as you can see in the attached image, the arrow is drawn on the unit, which is a bit ugly looking.
not sure floatHeight is responsible, that's just my guess.

of course this is a minor thing.