I mean, I guess the follow-me being behind him doesn't really make it very useful.
So the problem wasn't the "message", as the subject says, which was clearly correct, but the very fact the Follow me didn't end up in front of you ?
There are countless of sound reasons for this, none of them is GSX problem, of course:
- The the airplane might have moved while waiting the Follow Me cars. Yes, this is obviously allowed, but it might not always work, depending where the new position is, there might not be taxiways for the follow me to follow and end up in front of the plane, as it almost always does.
- Depending how the airport is made AND the position when the airplane was when calling the follow me, the same above situation might happen, even when not moving the plane while waiting.
- The Follow me is supposed to circle around you if it's behind but, again, it might not be possible everywhere or in every situation, for example if the airplane is located on a taxiway so, the follow me would have ended "in the grass" if it tried to circle around you.