I wouldn't necessarily call the issue a "problem", but, it doesn't seem easy to remedy so it could end up being considered a problem. Namely, what is going on is that some quests or mob kills automatically give a much higher ilevel to the item rewarded if you are higher level as a character. That means, when you have a rare ("rare") mob passing by that might give such a item, or if you get a quest that might have such an item, it gives a great incentive to not do it at all, and just wait for 110, which doesn't seem like something Blizzard would want to do and frankly anyone playing.