make sure your close range clipping, or whatever it's called, is set to a low number, because if it is also set to a high number it will do the same thing when you zoom in.
Other than these solutions I don't know what else could be the problem. Hopefully someone will be able to help
And make sure you restart maya, sometimes I noticed settings wont take place until I restart it. I think in the preference settings I had to restart it for it to work.