Share for review comments are sometimes misaligned - about 5 mm below the actual comment.

In the case of text errors usually few lines below the actual error-comment.

Web interface shows the comments in the right place, but something bad happens when illustrator reads the comments back in. Its persistent in every illustrator version i have.

The same bug keeps following me in different illustrator versions. I'm not sure what is causing this. One time i suspected some file specific bug, but it keeps reappearing in newly created files. Might it be related to bleed settings? I don't know. But this bug makes share for review feature quite ununseable for serious design professionals.