Sounds to me like the bullet could be a "pasted" character coming from an application. If an HTML unordered list is used, the problem should go away. Or, you can also replace the bullet character with its HTML entity which is •
Thanks for your advice. It seems to be an anomoly. We used the bullets points from the WYSWIG and this person still had an issue - however other iPhone users did not. • worked okay but if the dot point was over one line is caused issues with formatting unless we put it in a table. In the end we just left as is, as we could not replicate the issue the person was having.