There is a conflict between the general case and the specific case. I don't know if it's really a problem, but it's good to know if you want to get what you want.

The ellipsis won't be disable on text in this example :

<ListItem>
  <ListItemText primary={primary} ellipsis={false} />
</ListItem>

Whereas this way, it will be disable :

<ListItem ellipsis={false}>
  <ListItemText primary={primary} />
</ListItem>