Were you looking directly at the liner's 'graphic' on the Nav map?
If so, I'm 90% certain that something similar was discovered like this a long time ago.
If my memory serves (and it's not good
) there was an issue with an alpha channel in some of the graphics when at high zoom. I can't quite remember how this was fixed, whether it was the graphic that was changed or whether the zoom level was reduced by one step.
Needless to say, this problem is not evident in the later supermods.