Meteor 1.3 handlebars/template time issue

I upgraded my working project from 1.2.1 to 1.3 however i am noticing a strange issue with templates.

I have a dynamic nav dropdown and i am noticing that only 3 rows are shown with the dynamic options are hidden and i need to scroll down to view them.
What is happening is that the dynamic options are not getting added to the DOM at the same time as 1.2 and causing these options to have scroll.

FYI I fixed this using

.dropdown-content
{
height: auto !important;
overflow: visible !important;
}