I first saw this, or a similar glitch, a LONG time ago - maybe March? I was standing by the EITC dock when a ship came up to it. It was amazing! Then the ship paused and moved towards land and finally sailed up the stream and into the mountains!
So I was able to see the glitch from the island.
I've had the no porting glitch happen a few times at PR and Padres otherwise, but I've never seen players on the islands or had anyone say they've seen the ship when we do actually port.
Spoooky