Floating Tank Droids on Kashyyyk

I have noticed this curiosity since I first played the map (since launch) but it was never a priority of mine to mention it.  Anyway, I figured I'd mention it, now.  I don't know if it is considered a 'bug,' a technical issue or an 'easter egg.'  You tell me.  So, these droid tanks (NR-N99 Enforcers) are floating, stationary, over the sea behind the colossal trees on Kashyyyk (Galactic Assault).  There appear to be 5 or 6, in relatively close proximity.    

You can only see them if you pilot an aircraft and fly close enough to them.  You cannot collide with them, thankfully, or I would have reported this much sooner; Believe me now and hear me later.  Anyway, they're not hurting anything ...just slightly annoying and totally unrealistic.  Amphibious tanks...floating...way up in the sky...not simply hovering above the water.  If indeed they are not an intended anomaly, I don't know how in the world no game designer has detected these, yet.  I literally see them every time I play the GA map.

Of course, I will attach a screenshot.  I can do a fly-by video at some later time, if requested.  (I play the Xbox version, by the way.)