The other night I teleported to the mall region to check on it while it was gone from view then teleported back. I could see the Isle from the mall so thought nothing was wrong. But once again my avie got stuck (Web). I saw myself on the Isle but I couldn't stand on the ground without sinking. And while others could see my chat as if I was on the Isle, I saw chat as if I was on the mall. In effect, my camera moved to the Isle with my body but my actual presence was still in the mall. Eventually my two halves snapped back together, but it was annoying.
And I imagine it is playing havoc with traffic numbers and in-world commerce. Despite assurances that teleports aren't affected, I often hear from others that they couldn't directly access the Isle but had to pass through an adjacent region. While grid stability is vastly improved over the last two years it is clear that more work is needed.